1. I think you should buy the blue one.

That’s a good idea.

2. I don’t think you should sell your car.

Thanks for the advice, but I really need the money.

3. Let’s go bowling tonight.

Sorry, I can’t. I’m meeting a friend for dinner.

4. Why don’t we go skiing on Saturday?

Sounds like a good idea. Where do you want to go?

5. Why don’t you come with me to China?

Thanks, but I’ve already been there.