C．Claiming D．To claim

答案　C

解析　句意为：比任何疾病夺去的生命都要多，饥饿已成为全球头号健康威胁。claiming为现在分词作状语，与hunger构成主动关系。

6．-Do you know anything about British history?

-___________. I have no interest in it.

A．Take it easy

B．Please don't bother

C．It's up to you

D．No. It's beyond me

答案　D

解析　句意为：--你知道英国的历史吗？--不知道，这超出了我的理解范围，而且我对此不感兴趣。Take it easy慢慢来；Please don't bother请不要打扰；It's up to you由你来决定；No. It's beyond me不，这超出了我的理解范围。根据句意可知选D项。

7．My suggestion is that you _______seats with her.

A．would exchange B．exchanged

C．exchange D．shall exchange

答案　C

解析　suggestion后应用"should＋动词原形"的虚拟语气结构，should可以省略。

8．When I came in，Mary was sitting by the window，her legs crossed，and her chin rested on one fist，_______ lost in deep thought.

A．even if B．only if

C．if only D．as if

答案　D

解析　考查方式状语从句。As if好像，引导方式状语从句；even if即使，引导让步状语从句；only if只有，引导条件状语从句，且only if放于句首时主句要倒装；if only但愿，谓语动词要使用虚拟语气。根据后半句句意"她好像陷入了沉思"可知D项正确。

9．So difficult it ______to acquire a large vocabulary without the help of a teacher that he was close to giving up.

A．he have felt B．have he felt

C．he did fell D．did he feel

答案　D