妈妈向好友介绍说：“这是我儿子”，她可以说：________
A．This is my daughter. B．This is my son.
C．This is my brother.
( ) A: Where are the toys?
B: __________ on the bed.
A. It’s B. There are C. They are
( ) _________ a lot of water in the bottle.
A. There is B. There are C. There be
（）There _______ three toy cars on the sofa.
A. is B. are C. isn’t
（）-- ________ are the jeans? --They are on the bed.
A. Where B. What C. How
（）I ________ see any books on the desk.
A. can B. can’t C. aren’t