1.根据句意,用适当的代词填空.is this_____pen?NO,it isn't______.I think it’s Li Ming's.Yes,it's______.3.They helped______do the washing and we helped______take care of______children.
问题描述：
1.根据句意,用适当的代词填空.
is this_____pen?
NO,it isn't______.I think it’s Li Ming's.
Yes,it's______.
3.They helped______do the washing and we helped______take care of______children.
答