单项填空

Before the computer          , people could never imagine it could bring about such great changes to human life.                   （2009·12·福建龙岩一中检测）

A. came into being           B. was discovered

C. was come into being   D. was formed

解析：选A。句意为：在电脑出现之前，人们绝不会想到它会给人类的生活带来如此巨大的变化。电脑不能说是“被发现”或“被形成”的，排除B、D两项。come into being不能用于被动语态和进行时，排除C项，故选A。

Page No.297

重点句型

12. Why are they in danger of disappearing?

它们为什么处于灭绝的危险中？

常用结构：

in danger (of)       在危险中

be in danger of    有……的危险

be out of danger  脱离危险

The girl’s life was obviously in immediate danger.

很明显,这女孩的生命危在旦夕。

The sick man is in danger of death. 这位病人有死亡的危险。

The wounded policeman is now out of danger.

受伤的警察已脱离危险。

联想拓展

be a danger to sb./sth. 危险的人/因素

be dangerous for 对……有危险

endanger vt. 危害，危及

endangered adj. 有危险的；濒临灭绝的