lifewillcontinueontheearthform

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_________ life will continue on the earth for millions of years to come will depend on __________ this problem can be solved.

A．If; that	B．Whether; if
C．If; whether	D．Whether; whether

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— Tom is never late for work. Why is he absent today ?
— Something _______ to him.

A．must happen	B．should have happened
C．could have happened	D．must have happened

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If I ________ plan to do anything I wanted to. I’d like to go to Tibet and travel through as much of it as possible.

A．would

B．could

C．had to

D．ought to

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— Do you know where David is ? I couldn’t find him anywhere.
— Well. He ______ have gone far –his coat’s still here.

A．shouldn’t

B．mustn’t

C．can’t

D．wouldn’t

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— Catherine, I have cleaned the room for you.
— Thanks. You ______ it. I could manage it myself.

A．needn’t do	B．needn’t have done
C．mustn’t do	D．shouldn’t have done

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— I’ve taken someone else’s green sweater by mistake.
— It ______ Harry’s. He always wears green.

A．has to be

B．will be

C．mustn’t be

D．could be

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