满分5 > 初中英语试题 >

We all know trees play an important role...

We all know trees play an important role in _______up the air.

A. clean            B. cleaning

C. cleaned          D. Cleans

 

B 【解析】 试题分析:句意:我们都知道树在清洁空气中扮演了很重要的角色。介词in后跟动词时要用动词的ing形式,故选B。 考点:考查非谓语动词的用法  
复制答案
考点分析:
相关试题推荐

Lucy and Lily are twins, but they are different _____each other in many ways.

A. of               B. from         C. with         D. In

 

查看答案

It is necessary for students ______ good studying habits.

A. to have           B. having

C. have              D. with having

 

查看答案

--I think people here are friendly. Do you _______me?

--Yes, you are right.

A.play with          B. look at

C. agree with       D. laugh at

 

查看答案

Yangtze River is one of ______rivers in the world.

A. big               B. bigger

C. biggest           D. the biggest

 

查看答案

--Would you like some chocolate?

--No, thanks. I ______ eat chocolate. It is bad for my health.

A.almost            B. hardly

C. already          D. Usually

 

查看答案
试题属性

Copyright @ 2008-2019 满分5 学习网 ManFen5.COM. All Rights Reserved.