当你想问别人多大了时，你应该说：
A. How are you? B. How old are you?
John问你这是什么时，你应该说：
A. This is my toy. B. It is my toy.
Sarah的生日到了，你应该说:
A. Happy birthday to you! B. Very good!.
-Who’s that girl?
-
A. She is my friend.
B. She is a student.
C. She i s a beautiful girl.
-Where are you from?
-
A. I am from Beijing.
B. I like Beijing.
C. I don’t know.