The students entered the classroom,smiling and____,and___down to have their lessons

The students entered the classroom,smiling and____,and___down to have their lessons
Atalked ,sat B.talking,sitting Ctalking sat Dtalked ,sitting
英语人气:480 ℃时间:2020-01-25 00:39:29
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选c.应为sat 是和entered 并列的并列是什么意思,那么不应该全都是ING形式吗smiling 和talking 是并列的,但是sat 是和前面的entered 并列滴
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