题目内容

20．Look out!LooK at the traffic lights ____crossing the road．（　　）
A．beforeB．afterC．since

分析 当心！在过马路之前看看交通灯．

解答 答案：A．
根据设空处前面的Look at the traffic lights．推测本句的句意是"当心！在过马路之前看看交通灯．"表示"在…以前"用介词before，故选：A．

点评 把握句意和理解选项中介词的意思是做好本题的关键．

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Recently，I have trouble with my study．
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A．taking a break is necessary
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84．According to the underlined part，what might Liu Ya's teacher say？
A．Sleep for a minute．
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85．From Liu Ya's letter，we can find that she is tooC．
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