_ pollution is the key to _ the country a comfortable and clean place to live in.

admin2017-03-21 55

问题 _______ pollution is the key to _______ the country a comfortable and clean place to live in.

选项 A、To control; keep
B、To control; keeping
C、Control; keeping
D、Controlling; keep

答案B

解析考查非谓语动词。不定式短语作主语表目的；the key to(doing)sth．指“(做)某事的关键之处”，to为介词，后跟V—ing形式。句意为：“如果一个国家想拥有一个舒适干净的居住环境，控制污染是关键。”故选B项。

转载请注明原文地址:https://kaotiyun.com/show/WDXC777K

英语

相关试题推荐

随机试题

最新回复(0)