问题描述：
1:shall we go out for a walk?
___ ____ going out for a walk?
2:it's hard to talk to him.
he is ___ ___ ___ ___.
___ ____ going out for a walk?
2:it's hard to talk to him.
he is ___ ___ ___ ___.
问题解答：
我来补答展开全文阅读