His parents thought he was working very hard in the room, in fact, he was chatting with hi

发布时间：2020-08-16 09:37:49


His parents thought he was working very hard in the room,     in fact, he was chatting with his friends on the Internet.
A. when
B. where
C. which
D. while

网友回答

A. when
B. where
C. which
(答案→)D. while
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