Not until all the fish died in the river__________ how serious the pollution was．A．did the villagers realizeB．the villager srealizeC．the villagers did realizeD．didn't the villager srealize
Not until all the fish died in the river__________ how serious the pollution was．
A．did the villagers realize
B．the villager srealize
C．the villagers did realize
D．didn't the villager srealize
相关考题：
Tom dared not give any more explanations but waited until his girl friend’s anger. A.died offB.died outC.died ofD.died in
According to the passage, the most ambitious effort to control pollution ______.［A］could help improve the local economy［B］will be financially supported by the truckers［C］may depend on independent contractors［D］will upgrade all the trucks to reduce pollution
Passage FiveThe Northern Pike is a very bad fish. It is a big, hungry fish, and swallows little fish such as trout and perch. Many Northern Pikes live in Lake Davis. They are killing all the smaller fish in the lake. The Northern Pike are a serious threat to the lake because they eat all the smaller fish. Soon, all other species of fish in the lake will be killed off. This is not healthy for the environment.Experts are afraid that the Northern Pike will swim out of Lake Davis through many smaller rivers that feed into the lake. They could spread all over the country and damage many other water environments. If that happens, it would be too late to stop the Northern Pike.For ten years, officials have been trying to remove the Northern Pike from Lake Davis. They haw. tried using nets, explosives and poisons. However, the Northern Pike population is still doing well in Lake Davis. Many people do not like the idea of using poison to kill the fish. They worry that the poi- sons are bad for humans who use the water. No trace of the poisons has ever been found in local wells, however.Scientists are going to try the poison again. This time, they will drain the lake before they add the poison to the water. A public hearing will be held to talk about the problem.52. Why are some people against the use of poisons to kill Northern Pike?A. Fishermen will be poisoned too.B. The poisons are expensive.C. They think that wells will be polluted.D. The lake will become unsafe.
Why is it a problem if all the smaller fish species die?A. It's not healthy for the environment.B. People only like to catch big fish.C. There are too many small fish.D. The smaller fish can get lost in the lake.
Even though there has been a () with child prodigies for centuries, there has been little serious study of them until recently. A.facilityB.fascinationC.facultyD.assassination
We must do something to stop the pollution, and ______ we must make all the people realize how serious the problem is. A.after allB.above allC.in allD.at all
Under the Pollution Regulations，garbage disposal records must be kept ______.A.two yearsB.one yearC.until the next Coast Guard inspectionD.until the end of the voyage
Growing levels of pollution represent a serious health hazard to the,local population.A:protection B:indicationC:immunityD:danger
Growing levels of pollution represent a serious health hazard to the local population.A:protection B:indicationC:immunity D:danger
Growing levels of pollution represent a serious health hazard to the local population.A:protection B:indication C:immunity D:danger
The fans did not think( )of him because they know how poorly he was. A.high B.highly C.bad D.badly
We can't tell you the results until we have looked at（）A、all the datumB、the all dataC、all the dataD、the all datum
In IS-IS, how long will the restart helper keep the restarting router in the up state?（）A、until the hello dead timer expiresB、until the restart duration timer expiresC、until the restarting router sets the down bitD、until the restart helper sends out three CSNPs
You upgraded Oracle Database 10g to Oracle Database 11g. How would this affect the existing users’ passwords？（） A、 All passwords automatically become case-sensitive.B、 All passwords remain non-case-sensitive till they are changed.C、 All passwords remain non-case-sensitive and cannot be changed.D、 All passwords remain non-case-sensitive until their password attribute in the profile is altered.
问答题Directions： Cars play an important role in modern society. But they are also responsible for a good part of air pollution in big cities. Write an essay on car and air pollution and base your composition on the outline below: （1）the serious problem of air pollution caused by cars; （2）your suggestions on how to deal with the problem. You should write about 150 words neatly on the ANSWER SHEET.
问答题Directions： Cars play an important role in modern society. But they are also responsible for a good part of air pollution in big cities. Write an essay on car and air pollution and base your composition on the outline below: （1）the serious problem of air pollution caused by cars; （2）your suggestions on how to deal with the problem. You should write about 160-200 words neatly on the ANSWER SHEET.
单选题The most serious kind of pollution is _____.Anoise pollutionBair pollutionCwater pollutionDA, B and C
填空题The fast (develop) ____ of the local economy has caused serious water pollution in this region.
单选题At the G20 meeting, many good ideas ______ on how to fight against pollution all over the world.Aset upBput upCpicked upDcame up
单选题The Pollution Prevention Regulations require that all oil spills in United States water be reported immediately to the （）.Alocal port authorityBCorps of EngineersCUSCoast GuardDstate pollution board
单选题How should signal flares be used after you have abandoned ship and are adrift in a liferaft?（）.AImmediately use all the signals at onceBUse all the signals during the first nightCEmploy a signal every hour after abandoning ship until they are goneDUse them only when you are aware of a ship or plane in the area
单选题What is the passage mainly about?AHow to fight air pollution in big cities.BHow to avoid air pollution in big cities.CHow to breathe fresh air in big cities.DHow serious air pollution is in big cities.
单选题You upgraded Oracle Database 10g to Oracle Database 11g. How would this affect the existing users’ passwords？（）A All passwords automatically become case-sensitive.B All passwords remain non-case-sensitive till they are changed.C All passwords remain non-case-sensitive and cannot be changed.D All passwords remain non-case-sensitive until their password attribute in the profile is altered.
单选题All engineer officers and engine room ratings shall be aware of the serious effects of operational or accidental pollution of the marine environment and shall take all possible（） to prevent such pollution, particularly within the framework of relevant international and port regulations.AstepsBproceduresCprecautionsDprograms
单选题Now the pollution caused by the increasing number of cars _____ more and more serious in many cities.AbecomeBbecameCis becomingDhad become
单选题According to the report, air pollution in big cities _____.Acan be more serious than Chernobyl nuclear disasterBcannot be compared with the disaster in ChernobylCcan release as damaging radiation as the Chernobyl disasterDcan be more serious than we used to think