题目内容


Walking in space _________sound easy, yet great care and skills are required.
A．mayB．shallC．shouldD．must
A
略
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If you ______ earlier, you ________ him.
A．came; would meetB．had come; would have met
C．had come; would meetD．would come; met

She _______ have left school, for her bike is still there.
A．can’tB．wouldn’tC．shouldn’tD．needn’t

—I’m surprised more and more people________participate in the morning exercises in the plaza now.
—Morning is a time of day.
A．shouldB．canC．mayD．need

——The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
——____ Tom have a try?
A．Shall B．CanC．WillD．Need

What do customers demand __________to make up for their loss?
A．be doneB．to be doneC．is doingD．is to do

．—______ I lock the lab before I go home?
—Don’t bother．I’ll check it myself later．
A．MayB．MustC．CanD．Shall
_______ Tom, we wouldn’t have been late for the last bus.
A．If we didn’t wait forB．If we haven’t waited for
C．we hadn’t waited for D．Had we not waited for

Curious about the world around them, children___________ask their parents endless questions.
A．canB．mayC．shallD．will

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