Iwonttellthestudenttheanswerto

I won't tell the student the answer to the math problem until he on it for more than an hour.

A．has been working	B．will have worked
C．will have been working	D．had worked

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A．to get worse

B．getting worse

C．to be getting worse

D．to have got worse

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A．met

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A．where

B．in which

C．what

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The secretary has a lot of things to ________ in the office since she has been away for quite a few days.

A．make up

B．take up

C．work out

D．carry out

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________ your composition carefully, some spelling mistakes can be avoided.

A．Having checked

B．Checking

C．If you check

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