选B
with three students
是插入语,可以删除
所以在有插入语的情况下
主语仍然是a teacher
A taecher ,with three students ,_____in the office now.
A taecher ,with three students ,_____in the office now.
A are sittingB is sitting C were sitting D was sitting
A are sittingB is sitting C were sitting D was sitting
英语人气：371 ℃时间：2020-04-07 15:08:51
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