Once harm ______ to the environment, it takes years to have the system recovered

题型：不详难度：来源：

Once harm ______ to the environment, it takes years to have the system recovered.

A．does

B．is done

C．will be done

D．be done

答案

解析

略

举一反三

Our monitor, who by then ______ admission to Fudan University, decided to do some part-time jobs to gain more practical experience.

A．gained

B．was gaining

C．has gained

D．had gained

题型：不详难度：| 查看答案

Tom ______to paint the fence but he got his friends to do it for him.

A．supposed

B．was supposing

C．had supposed

D．was supposed

题型：不详难度：| 查看答案

Mary failed the driving test again．If she ______ harder, she ______ the test easily．

A．practiced; would pass	B．had practiced; would pass
C．had practiced; would have passed	D．should practice; should have passed

题型：不详难度：| 查看答案

Not only his parents but also his brother ________ to the Summer Palace. They haven"t
been back.

A．have been

B．have gone

C．has been

D．has gone

题型：不详难度：| 查看答案

The question ______by us soon.

A．is going to discuss	B．will discuss
C．is going to be discussed	D．has been discussed

题型：不详难度：| 查看答案