根据所提供的情景选择适当的句子。
(   )（1）下午与同学见面，你应说：
A. Good afternoon. B. What’s your name? C. How are you?
(   )（2）晚上分手时所用礼貌用语是：
A. Hi!     B. Hello! C. Good night!
(   )（3）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.
(   )（4）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.
(   )（5）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?