76 7.The new machinehas now performed _ for 2,000 hours.

[单选题]The repairing of the switchgear must( )in two hours.A.finishB.be finishedC.

In fact, there are different reasons（        ）people are working long hours.A. w

[单选题]It saved them an hour during a procedure that would normally take three hou

He didnt look well, for he ______ for sixteen hours.A. had workedB. would have w

[单选题]So far 2，000 tons of reefer cargo（）.A . is loadedB . are loadedC . have loadedD . have been loaded

They left three hours ago; they ______ there by now.A. must arriveB. can arriveC

[单选题]The teacher's lecture on pronunciation lasted for three hours. Many of us f

[单选题]We confirm ____ purchased 2,000 MP3 Players ____ you.A . have, toB . having, fromC . to have, fromD . have been to

[单选题]First two hours, now three hours—this is how far in advance authorities are

[单选题]First two hours, now three hours—this is how far in advance authorities are