情景交际。

1. 当别人对你表示感谢时，你应说：[ ]

A. That's right.

B. You're welcome.

C. You're right.

2. 当别人对你的成功表示祝贺时，你应说：

A. All right.

B. That's right.

C. Thank you.

3. 当别人对你发出邀请，你同意时，你应说： [ ]

A. Thank you. I'd love to.

B. No, I don't do that.

C. I go.

4. 当你想帮助别人时，你应说： [ ]

A. Can you help me?

B. May I help you?

C. Help me.

5. 当你想祝别人旅途愉快时，你应说：[ ]

A. Have a nice trip.

B. Did you have a nice trip?

C. I have a nice trip.

除去下列物质中所混有的少量杂质，写出有关的反应方程式．

（1）铜粉中混有少量铝粉______；

（2）FeCl₃中混有少量FeCl₂______．