1. I think you should buy the blue one.

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

3. Let's go bowling tonight.

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

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

That's a good idea.

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

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

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

Thanks, but I've already been there.