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Why the explosion occurred was the laboratory attendant had been careless. A．for

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Why the explosion occurred was the laboratory attendant had been careless. A．for

 Why the explosion occurred was____the laboratory attendant had been careless.

A．for

B．because

C．since

D．that

 

试题答案

【答案】

D

【解析】略

 

标签：waslaboratoryattendantoccurredwhy

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