想知道对方的年龄，应怎样问? （）
A. How old are you?
B. How are you?
C. How do you do?
上课铃响了，教师走进教室，班长应该说：（）
A.Please come in.
B. Good morning.
C. Stand up.
当经介绍后认识某人时，你应该说：（）
| A．Good morning. |
| B．Please sit down. |
| C．Thank you. |
| D．Nice to meet you. |
晚上分手时所用礼貌用语是：（）
A. Hi! B. Hello! C. Good night!
下午与同学见面，你应说：（）
A. Good afternoon.
B. What’s your name?
C. How are you?