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
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。

I was just about to go out ________ the phone rang.
A. while B. as C. when D. since
C
when相当于atthat time就在那时。此用法不能用其他词代替。