But for electricity, human life _____ so easy today.A．isn’t B．would not beC．will

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But for electricity, human life _____ so easy today.

A．isn’t

B．would not be

C．will not be

D．would not have been

答案

解析

略

举一反三

— Are you going to the ball tonight? —It’s too late now. How I wish ___ about it earlier.

A．I’ll know

B．I’ve known

C．I know

D．I’d known

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--- Where is Jack?
--- He _________ football on the playground with those AFS students, but I am not sure.

A．must be playing	B．must have played
C．may be playing	D．may have played

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It has been announced that all the students ______ put on the masks before going to school in case they are infected with SARS virus.

A．shall

B．will

C．need

D．may

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______you like to have dinner with me this evening?

A．Would

B．Must

C．Dare

D．Can

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– I was trying to repair that stupid machine, but I failed.
-- Well, you_______.

A．needn’t do that

B．needn’t have done

C．needn’t have

D．needn’t

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