按要求填空 每词一空
1.This is my mother.(改为否定句)
This ____ ____my mother.
2.Those are rings.(改为一般疑问句)
_____ _____ rings?
3.Is he your grandfather?(作肯定回答)
_____, he _____.
4.Those are pencil cases. (对pencil cases提问)
_____ ______ those?
5.This is a watch.(改为复数句)
_____ are _______.