I won’t leave the classroom until my homework .A．finishesB．is finis

题型：不详难度：来源：

I won’t leave the classroom until my homework .

A．finishes

B．is finished

C．will finish

D．are finished

答案

解析

后句的从句根据句意是一个被动句，我的作业只能承受动作，充当承受者，被动句
的结构为be+过去分词，my homework 是不可数名词，故选B。

举一反三

Teenagers allowed to drive in the street .

A．should not be

B．should be not

C．not should be

D．shouldn’t

题型：不详难度：| 查看答案

Can 16-year-old students drive to school?
No, they shouldn’t ______ to drive because they aren’t serious enough.

A．allow

B．be allowed

C．allowed

D．have allowed

题型：不详难度：| 查看答案

This kind of flower 　　　 well these days. Would you like to have one?

A．sell

B．sells

C．are sold

D．is sold

题型：不详难度：| 查看答案

Nobody ______ to go into the laboratory without permission (允许).

A．allows

B．is allowed

C．promises

D．is promised

题型：不详难度：| 查看答案

They ________ often _______to be careful before _______the road.

A．are, told, cross

B．are, told, across

C．are, telling, crossing

D．are, told; crossing

题型：不详难度：| 查看答案