5．The police are _____ the cause of the accident．（　　）
A．looking intoB．looking upC．looking outD．looking for

分析 警察正在調(diào)查事故起因．

解答 答案是A．考查動詞辨析．look into 調(diào)查，觀察；look up 查找，檢查；look about 四處尋找；look for 尋找．句意是：警察正在調(diào)查事故起因．故選A．

點評 解答此類問題首先需要理解每個詞組的含義，然后結(jié)合語境選擇正確答案．

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