While listening in class.you should concentrate your teacher．( )A．atB．toC．forD．on 题目和参考答案——青夏教育精英家教网—

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16．While listening in class，you should concentrate ____ your teacher．（　　）

A．

B．

C．

for

D．

分析上课听讲时，你应该集中注意力．

解答答案：D 根据concentrate ____ your teacher，本题考查固定短语concentrate on sb．集中注意力，故选D．

点评英语的介词较多，词义多样，运用较多，需要同学们认真掌握．

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