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I was just about to go out the phone rang. A. while B. as C. when D. since

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I was just about to go out the phone rang. A. while B. as C. when D. since

I was just about to go out ________ the phone rang.

A. while  B. as  C. when D. since

 

试题答案

C

when相当于atthat time就在那时。此用法不能用其他词代替。