附加题：从A、B、C三个选项中，选出能填入空白处的最佳答案。

1. 当你结识一位新朋友时，你应该对他说 ____ [ ]

A. How old are you?

B. Nice to meet you.

C. I am sorry.

2. 当你的朋友帮助了你，你向他道谢时说 ____ [ ]

A. Thank you.

B. You're welcome.

C. Here you are.

3. 当你问同学这是什么时，你说 ____ [ ]

A. Where are you from?

B. What is this?

C. Who is he?

4. 你上学迟到了，你应该对英语老师说 ____

[ ]

A. That's OK.

B. I don't know.

C. Sorry, I am late.

5. 早上向老师问候时说 ____ [ ]

A. Good morning.

B. Good afternoon.

C. Good evening.