Radium salts，which have been found to ______ in bones，give rise to bone cancer.A

题型：不详难度：来源：

Radium salts，which have been found to ______ in bones，give rise to bone cancer.

A．pile up　

B．build up

C．keep up　

D．pull up

答案

解析

考查短语辨析。build up(="accumulate)" 积累。pile up 堆积。keep up 保持，维持。 pull up 停车。根据句意选B。

举一反三

The best way to deal with these bad habits is not to _______ the habit in the first place.

A．get into

B．come into

C．knock into

D．run into

题型：不详难度：| 查看答案

I don’t know why he has been absent _______ class for so long.

A．in

B．for

C．with

D．from

题型：不详难度：| 查看答案

Though he had tried to swim across the English Channel, he didn’t _______.

A．get it

B．make it

C．arrive it

D．do it

题型：不详难度：| 查看答案

He should have come here earlier, but he hasn’t _____yet.

A．turned in

B．turned up

C．turned on

D．turned

out

题型：不详难度：| 查看答案

Suddenly it _________ to me that I should report the accident to the police.

A．happened

B．struck

C．occurred

D．hit

题型：不详难度：| 查看答案