I was reading a novel he was watchingTV.A. whenB. whileC. beforeD. as

发布时间：2020-08-16 07:12:51

I was reading a novel     he was watchingTV.
A. when
B. while
C. before
D. as

网友回答

A. when
(答案→)B. while
C. before
D. as
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