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35.________help the people in the snowstorm in the south made him worried.

A.Not known how to     

B.Unknown what to do to

C.Our knowing not how to  

D.Our not knowing how to

答案与解析:D 非谓语动词的否定形式要求not要放在前面,如not having done sth.,如果这个非谓语动词有其逻辑主语,则要放在最前面,如his not having done sth.。句意为:我们不知道怎么帮助南方那些遭受雪灾的人们让他很着急。故选D。

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34.Missiles are now more________than ever.It can hit a target within 20 kilometers.

A.exact              B.accurate

C.correct             D.definite

答案与解析:B accurate是“准确无误的;准确的(掷、射、击等)”;exact为“精确的;准确的”;correct“正确的”,仅区别对与错;definite“确定的”,旨在区别确定与不确定。

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33.It is difficult to________one twin from the other.They almost don't________from each other.

A.differ; distinguish        B.distinguish; different

C.distinguish; differ        D.tell; different

答案与解析:C 句意为:很难把两个双胞胎区别开,他们彼此几乎没有区别。distinguish A from B,表示“区分,辨别”;differ from each other意思是“有区别,不同于”。故选C。

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32.The teacher explained the________of the themes expressed in the poem with passion.

A.reference               B.significance

C.means             D.magnificence

答案与解析:B 句意为:老师激情澎湃地解释这首诗的主题意义。A项表示“参考,参照”;B项表示“意义;重要性”;C项表示“意思是,意味着”;D项表示“壮丽,宏伟”。根据句意选B。

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