根据所给语境，选择适当的答案。
1. 当你上学迟到时，你可以这样对老师说：[ ]
A. It doesn't matter.
B. I'm sorry. I'm late.
C. That's all right.
2. 当别人对你说 " What's your job? ” 你可以说： [ ]
A. I'm Kate.
B. I'm a doctor.
C. I'm Li Ming's mother.
3. 当别人对你说“Let's go skating!”，你不想去可以说：[ ]
A. Sorry, I am busy.
B. OK, let's go.
C. That's a good idea.
4. 当你的朋友说“I've got a bad cough.”，你可以说：[ ]
A. How are you?
B. I'm sorry to hear that.
C. How do you do?
5. 开学后，老师第一次见到同学们，会说：[ ]
A. What's your name?
B. Welcome back to school, boys and girls.
C. Goodbye boys and girls.
6. 你想知道有多少把椅子，可以说：[ ]
A. How many chairs do you have?
B. How many chair do you have?
C. Where are the chairs?
7. 您想告诉别人“今天是星期一”时，可以说：[ ]
A. Today is Monday.
B. Today is Tuesday.
C. What day is today?
8. 你想对别人说“对不起”，可以说：[ ]
A. Thank you.
B. Sorry.
C. Goodbye.
9. 你想让别人看大象，应该说：[ ]
A. Look at the elephant.
B. Look the elephant.
C. Look after the elephant.
10. 你想问别人，“你在哪儿”时，应该说：[ ]
A. When are you?
B. Where are you?
C. What are you?
11. 你想对一个熟人打招呼，应该说：[ ]
A. How do you do?
B. Where are you?
C. Hello!
12. 下午与朋友见面时，应该说：[ ]
A. Good morning.
B. Good afternoon.
C. Good evening.
13. 你有事麻烦别人，可以说：[ ]
A. Excuse me.
B. You're welcome.
C. I'm sorry.
14. 你想说“我有6支铅笔”时，应该说：[ ]
A. I have six pencils.
B. I have six pen.
C. There're six pencils.
15. 你想告诉别人“我很高”时，应该说：[ ]
A. I'm tall.
B. I was tall.
C. I am short.