______ to use crutches for six months severely limited Mr. Locke's ability to work in the shipping facility.A. HasB. HaveC. HavingD. Has had
______ to use crutches for six months severely limited Mr. Locke's ability to work in the shipping facility.
A. Has
B. Have
C. Having
D. Has had
B. Have
C. Having
D. Has had
参考解析
解析："______ to use crutches for six months"作句子的主语，所以应该用动名词短语作主语。故本题正确答案为C。
相关考题：
3．，—How was your school trip?—The students＿＿＿＿＿school trip．A． have a greatB． had a greatC． having a goodD． has a great
--- Hi, Terry, can I use your computer for a while this afternoon?--- Sorry. __ . A． It' s repairedB． It has been repairedC． It's being repairedD． It had been repaired
Progress so far very good and we are sure that the work will be finished on time.A. was B. had been C. has been D. will be
All the money ______, Frederick started looking for work.A. having spentB. has been spentC. having been spentD. had been spent
Mr. Jones ________ in the company for twenty years by the end of next month. A.will workB.will have workedC.has workedD.would work
The marketing department() the sales for the last six months. A、summarizedB、was summarizedC、has summarized
The old couple () good times and hard times as well. A、has seenB、had seenC、have seenD、having seen
The marketing department()the sales for the last six months.A. has summarizedB. summarizedC. was summarized
The meeting _____when Mr. Wang _____to school.A、has begun; getB、has been on; getC、had begun; gotD、had been on; got
--- Hi, Terry, can I use your computer for a while this afternoon?--- Sorry. .A. It' s repaired B. It has been repairedC. It's being repaired D. It had been repaired
—Is Mr. Green at home ? 学科网 —No , he _______ Shanghai .学科网A. has been to B. ha —Is Mr. Green at home ?—No , he _______ Shanghai .A. has been to B. has gone to C. is going to
—David has made great progress recently. —_______， and _______. A. So he has；so you have B. So he has；so have you C. So he has；so do you D. So has he；so you have
共用题干Using HIV Virus to Cure CancerScientists are planning to use human immuno deficiency（免疫缺陷）virus(HIV) , one of mankind's most feared viruses,as a carrier of genes which can fight cancer and a range of diseases that cannot be cured.The experts say HIV has an almost perfect ability to avoid the body's immune（免疫的）defenses, making it ideal for carrying replacement genes into patients'bodies,according to the Observer.A team at the California-based Salk Institute,one of the world's leading research centers on biological sciences,has created a special new breed of HIV and has started negotiations with the U.S.Food and Drug Administration(FDA)to begin clinical gene therapy（治疗）trials this year.The first trials are expected to involve patients suffering from cancers that cannot be cured by surgery although project leader Professor Inder Verma said the HIV technique would have“far wider applications”.The plan remains very likely to cause controversy since it involves making use of a viruswhich has caused more than 22 million deaths around the world in the past two decades.Verma said that the idea of using HIV for a beneficial purpose was“shocking”but the fierce nature of HIV had disappeared by having all six of the potentially deadly genes removed.Illnesses such as various cancers are caused when a gene in a patient's body fails to work properly.In the past two years, breakthroughs in genetics（遗传学）have led gene therapy sci-entists to try and replace the genes that do not function normally.Unfortunately,the body's immune defenses have been known to attack the modified genes and make them lose their effects before they can start their task and progress in the field has been held up by the lack of a suitable carrier.The HIV virus has the ability to escape from,and then destroy,the immune defense cells designed to protect our bodies and this makes it attractive to scientists as a way of secretly conveying replacement genes into patients'bodies.The HIV virus has caused more deaths in developed countries.A:RightB:WrongC:Not mentioned
共用题干Using HIV Virus to Cure CancerScientists are planning to use human immuno deficiency（免疫缺陷）virus(HIV) , one of mankind's most feared viruses,as a carrier of genes which can fight cancer and a range of diseases that cannot be cured.The experts say HIV has an almost perfect ability to avoid the body's immune（免疫的）defenses, making it ideal for carrying replacement genes into patients'bodies,according to the Observer.A team at the California-based Salk Institute,one of the world's leading research centers on biological sciences,has created a special new breed of HIV and has started negotiations with the U.S.Food and Drug Administration(FDA)to begin clinical gene therapy（治疗）trials this year.The first trials are expected to involve patients suffering from cancers that cannot be cured by surgery although project leader Professor Inder Verma said the HIV technique would have“far wider applications”.The plan remains very likely to cause controversy since it involves making use of a viruswhich has caused more than 22 million deaths around the world in the past two decades.Verma said that the idea of using HIV for a beneficial purpose was“shocking”but the fierce nature of HIV had disappeared by having all six of the potentially deadly genes removed.Illnesses such as various cancers are caused when a gene in a patient's body fails to work properly.In the past two years, breakthroughs in genetics（遗传学）have led gene therapy sci-entists to try and replace the genes that do not function normally.Unfortunately,the body's immune defenses have been known to attack the modified genes and make them lose their effects before they can start their task and progress in the field has been held up by the lack of a suitable carrier.The HIV virus has the ability to escape from,and then destroy,the immune defense cells designed to protect our bodies and this makes it attractive to scientists as a way of secretly conveying replacement genes into patients'bodies.HIV can be safely used to cure cancer only if the deadly genes have been removed.A:RightB:WrongC:Not mentioned
共用题干Using HIV Virus to Cure CancerScientists are planning to use human immuno deficiency（免疫缺陷）virus(HIV) , one of mankind's most feared viruses,as a carrier of genes which can fight cancer and a range of diseases that cannot be cured.The experts say HIV has an almost perfect ability to avoid the body's immune（免疫的）defenses, making it ideal for carrying replacement genes into patients'bodies,according to the Observer.A team at the California-based Salk Institute,one of the world's leading research centers on biological sciences,has created a special new breed of HIV and has started negotiations with the U.S.Food and Drug Administration(FDA)to begin clinical gene therapy（治疗）trials this year.The first trials are expected to involve patients suffering from cancers that cannot be cured by surgery although project leader Professor Inder Verma said the HIV technique would have“far wider applications”.The plan remains very likely to cause controversy since it involves making use of a viruswhich has caused more than 22 million deaths around the world in the past two decades.Verma said that the idea of using HIV for a beneficial purpose was“shocking”but the fierce nature of HIV had disappeared by having all six of the potentially deadly genes removed.Illnesses such as various cancers are caused when a gene in a patient's body fails to work properly.In the past two years, breakthroughs in genetics（遗传学）have led gene therapy sci-entists to try and replace the genes that do not function normally.Unfortunately,the body's immune defenses have been known to attack the modified genes and make them lose their effects before they can start their task and progress in the field has been held up by the lack of a suitable carrier.The HIV virus has the ability to escape from,and then destroy,the immune defense cells designed to protect our bodies and this makes it attractive to scientists as a way of secretly conveying replacement genes into patients'bodies.The HIV virus is an excellent warrior to fight the body's immune cells.A:RightB:WrongC:Not mentioned
共用题干Using HIV Virus to Cure CancerScientists are planning to use human immuno deficiency（免疫缺陷）virus(HIV) , one of mankind's most feared viruses,as a carrier of genes which can fight cancer and a range of diseases that cannot be cured.The experts say HIV has an almost perfect ability to avoid the body's immune（免疫的）defenses, making it ideal for carrying replacement genes into patients'bodies,according to the Observer.A team at the California-based Salk Institute,one of the world's leading research centers on biological sciences,has created a special new breed of HIV and has started negotiations with the U.S.Food and Drug Administration(FDA)to begin clinical gene therapy（治疗）trials this year.The first trials are expected to involve patients suffering from cancers that cannot be cured by surgery although project leader Professor Inder Verma said the HIV technique would have“far wider applications”.The plan remains very likely to cause controversy since it involves making use of a viruswhich has caused more than 22 million deaths around the world in the past two decades.Verma said that the idea of using HIV for a beneficial purpose was“shocking”but the fierce nature of HIV had disappeared by having all six of the potentially deadly genes removed.Illnesses such as various cancers are caused when a gene in a patient's body fails to work properly.In the past two years, breakthroughs in genetics（遗传学）have led gene therapy sci-entists to try and replace the genes that do not function normally.Unfortunately,the body's immune defenses have been known to attack the modified genes and make them lose their effects before they can start their task and progress in the field has been held up by the lack of a suitable carrier.The HIV virus has the ability to escape from,and then destroy,the immune defense cells designed to protect our bodies and this makes it attractive to scientists as a way of secretly conveying replacement genes into patients'bodies.Other countries are also expected to begin clinical gene therapy trials soon.A:RightB:WrongC:Not mentioned
Akira Nakayama ____delay the filming of his documentary in the rainforest when his equipment did not arrive on schedule.A.has toB.had toC.having toD.will have to
____ just six months ago, Finson’s Grill has quickly become one of the most popular restaurants in Detion.A.OpenedB.Had been openingC.Been openedD.To open
She won′t be available between 6 and 8,for she ______ an important meeting.A.has had B.had hadC.would have had D.will be having
People appreciate ______ with himbecause he has a good sense of humor.A.to work B.to have workedC.working D.having worked
He_______here for 20 years by the end of next month．A.had workedB.has workedC.will have workedD.will work
Mr. Jones（）in the company for twenty years by the end of next monthA、will workB、will have workedC、has workedD、would work
A customer has just purchased six x346 servers running Windows 2003 Web Edition.They are expecting to add six additional x346’s in three months.They have a requirement to automatically deploy the current server image upon the new servers. What TWO actions are required to complete this task？（）A、Ensure Director Agent is installed on the new servers.B、Ensure a DHCP Sever is installed and configured in the environment.C、Ensure Server Plus Pack option has been installed and configured.D、Ensure Software Distribution has been installed on the IBM Director Server and an image has been created.E、Ensure Remote Deployment Manager has been installed on the IBM Director Server and an image has been created.
You have a server that has very limited memory but has a very large table. You will use mysqldump to back up this table. Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?（）A、— quickB、— skip-bufferC、— single-transactionD、— tab
单选题Which of the following sentences is INCORRECT?AHis father has been dead for six years.BHis father died six years ago.CIt’s six years since his father had died.DIt has been two years since his father’s death.