We ( ) on it for many hours but we have not yet reached any conclusion. A、have had workedB、have been workingC、are workingD、work
We ( ) on it for many hours but we have not yet reached any conclusion.
A、have had worked
B、have been working
C、are working
D、work
相关考题：
我们从特供商场购买食品，并加强对所购食品的检查A.We’ll buy all the food from supermarket and check all the food we buy carefullyB.We’ll buy all the food from foreign countries and check all the food we buy carefullyC.We’ll import all the food and check all the food we buy carefullyD.We’ll buy all the food from exclusive shops and check all the food we buy carefully
Any open flame can’t exist in this business buildingA.Yes. We’ve removed all the flammable gas.B.Yes. We’ve searched everywhere for flammable liquidC.Yes. All the flammable liquid and gas have been removed already.D.Yes. We’ve removed all the liquid, gas and wood which can be burned
The problem is so serious that the situation is out of control.A.We’ve got to set up a police line and ask for aidB.We’ve got to ask for back-up from the PLA and policeC.We’ve got to report to the superiors rapidly and ask for back-upD.We have informed the authorities to take precautionary measures.
How many armored vehicles does your company dispatch for this job?A.We’ll dispatch several armored vehicles and escort securities for this jobB.The company has made a plan to send many vehicles and escort securities for this jobC.Two armored vehicles and experienced escort securities will be dispatched for this jobD.We’ll dispatch not only vehicles but also experienced securities for this job
We’re sorry to tell you that your remittance() yet. A、hasn’t arrivedB、won’t arriveC、doesn’t arrive
We' re sorry to tell you that your remittance()yet.A. won't arriveB. hasn't arrivedC. doesn't arrive
By the time the course ends, ( ) a lot about the British way of life.A. we have learnedB. we'll learnC. we are learningD. we'll have learned
We’ve got a full house, so if you really want to keep your room this afternoon, we’ll have to charge you 50% of the price. (翻译)
____ were all very tired, but none of ____ would stop to take a rest. A、We ; usB、Us ; weC、We ; ourD、We ; we