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They have the cause of the accident, but the result is still not known to us. [

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They have the cause of the accident, but the result is still not known to us. [

They have ________ the cause of the accident, but the result is still not known to us.

[]

A.looked forB.looked upC.looked intoD.looked round

试题答案

答案:C

解析:

look into这里作“调查”讲.