Whydoesthelakesmellterrible?Be

--Why does the lake smell terrible?
---Because large quantities of water ______.

A．have polluted	B．is being polluted
C．has been polluted	D．have been polluted

登录免费查看答案和解析

相关试题

It didn’t take the children long to________ the correct answer.

A．carry out

B．figure out

C．turn out

D．give out

收藏答案/解析

_____ herself to science, the great scientist took little notice _____ the honors given to her.

A．Devoted, of

B．Devoting, of

C．Devoted, about

D．Devoting, about

收藏答案/解析

The old couple, ____had been admitted to university, were living a hard life.

A．both their children	B．both of whom children
C．both of whose children	D．whose their children

收藏答案/解析

--Has Peter handed in his paper yet?
---I’m not sure. He _______ on it last week.

A．was working

B．has worked

C．worked

D．had worked

收藏答案/解析

The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.

A．can’t

B．shan’t

C．needn’t

D．mustn’t

收藏答案/解析

推荐套卷

热门套卷