1 . 杰瑞张了张嘴，似乎要说什么。(汉译英)
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2 . The student stared at the complex math problem on the board, puzzled, ________ it were written in a foreign language.

A．in case

B．even if

C．as if

D．so that

3 . 她看上去好像对此一无所知。其实不然。(as if/though) (汉译英)

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4 . 大卫坚持要跑，好像他忘记了所有的弱点，尽管他在几公里内被绊倒了。(汉译英)

5 . He boarded the airplane as if he ________ an experienced traveller, yet he had never left town before.

A．is

B．were

C．has been

D．had been

6 . The child talks to us ________.
那个孩子跟我们谈起话来像个大人似的。