The students ____ One Day ,One Day when Miss Liu came in the classroom.0.0The students ____ One Day ,One Day when Miss Liu came in the classroom.A.sing B.sang C.are singing D.were singing
问题描述：
The students ____ One Day ,One Day when Miss Liu came in the classroom.0.0
The students ____ One Day ,One Day when Miss Liu came in the classroom.
A.sing B.sang C.are singing D.were singing
答
d 某天当liu进入教室的时候，学生们正在唱歌。说的是过去发生的事，所以用过去完成时
答
选D（过去进行时）
AC时态不对
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