Youmustdoyourhomeworknow;youba

You must do your homework now; you ___ basketball all the evening．

A．have been playing	B．play
C．are playing	D．played

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The development of industry has been ________ gradual process throughout ________ human existence, from stone tools to modern technology.

A．/; the

B．the; a

C．a; /

D．a; a

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—What shall we do tonight then?
—_______ -whatever you want.

A．Help yourself

B．It’s a deal

C．No problem

D．It’s up to you

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It suddenly occurred to him ________ he had left his keys in the office.

A．whether

B．where

C．which

D．that

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It was a real race ________ time to get the project done. Luckily, we made it.

A．over

B．by

C．for

D．against

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—How far can you run without stopping?
—_________. I’ve never tried.

A．Don’t mention it

B．That’s all right

C．I have no idea

D．Go ahead

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