—Must we do something to keep our country clean?—----------.

问题描述：

—Must we do something to keep our country clean?—__________.
A.Yes,you needn't.B.Yes,we need.C.Yes,of course.D.No,we mustn't.
这题.有些特别,所以请说明选哪个不选哪个,为什么不选那个

1个回答分类：英语 2014-11-11