题目内容

3．_______ the sight of the police officers，the thief ran off．（　　）
A．InB．AtC．OnD．With

分析 一看到警察，那个小偷就跑了．

解答 答案：B．
at the sight of意为"一看到…"，为一个固定的介词短语，其他的介词都没有这种搭配；故选B．

点评 有些介词的使用是比较独立的，记住即可．

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