如果你想问他们经常做什么，你可以问：
A. What do they often do? B. What are they doing? C. What can they do?
—Have some tea，please.
—____________
A．Thank you. B．OK! C．Thanks you.
—What a small pen!
—____________
A．Sure! B．Wow! C．Hi!
—Is he your father?
—____________
A．No，he is. B．Yes，he is. C．Really?
—Who's this girl?
—____________
A．He's my sister. B．She's my brother. C．She's my sister.
—This is my friend.
—____________
A．How funny! B．Nice to meet you! C．OK!