找出下列单词中划线部分字母发音不同的单词，并将其序号填入题前括号内：
（1）A. Canada B. England C. America D. grade
（2）A. cool B. book C. school D. food
（3）A. doctor B. orange C. carrot D. hot
（4）A. nice B. milk C. nine D. pineapple
（5）A. letter B. watermelon C. basket D. yellow
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，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