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C. now that D. as long as

蕴涵知识点:这里只能用as long as表示"只要"的意思。

11. draw one's attention吸引某人的注意力

She ____ my attention to that fact.

A. beat B. shook

C. drew D. sent

蕴涵知识点:这里只能用draw my attention来表示"吸引我的注意力"。

12. fix one's attention on/upon sth.集中注意力在……

With his attention ____ on the blackboard, he didn't notice me when I came in.

A. fixing B. fixed

C. to fix D. fix

蕴涵知识点:此句是fix one's attention on/upon sth.的变式,由于是被动语态,所以必须用过去分词。

13. on average平均起来;一般说来

We fail one student per year ____ average.

A. on B. of

C. atD. with

蕴涵知识点:on average是固定搭配,不能选择其他介词。

14. give away赠送;出卖

He wanted to pretend to be an American but his accent ____ him away.

A. put B. threw C. gave D. took