According to the factory safety rules, all accidents _____ b..

According to the factory safety rules, all accidents _____ be reported to the safety officer.A.mayB.canC.wouldD.shall

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You'll not succeed _____ you work hard. [ ]A. whenB. if ..

You'll not succeed _____ you work hard.A. whenB. if C. unlessD. because

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It will be some time _____ we know the full results. [ ]A...

It will be some time _____ we know the full results.A. if B. sinceC. when D. before

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Frank insisted that he was not asleep _____I had great diffi..

Frank insisted that he was not asleep _____I had great difficulty in waking him up.A. whetherB. although C. for D. so

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Overloaded with work, school teachers now get far less sleep..

Overloaded with work, school teachers now get far less sleep than they ______.A.shallB.shouldC.mayD.might

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