The repairing of the switchgear must( )in two hours.

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

76 7.The new machinehas now performed _ for 2,000 hours.A. relianceB. relyC. rel

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

[单选题]B．Spending two or three hours playing outdoors each day can reduce a child’s chance of becoming short-sighted, a research shows. It challenges (挑战) the belief that short- sightedness is caused by computer use, watching TV or reading in weak light.The

The flight was delayed for two hours owing to（     ）reasons.A. adaptiveB. altera

[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

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