There are some birds_________ happily in the trees.A. singB. are singingC. singi

题干

There are some birds_________ happily in the trees.
A. sing
B. are singing
C. singing

上一题下一题 0.65难度单选题更新时间:2014-08-13 03:02:09

小学学科试题库

初中学科试题库

高中学科试题库