用方框中所给单词的适当形式填空，使对话通顺、正确，每词仅用一次(每空一词)。

A: What's that, Nick?

B: Oh, it's my , Come and look at it, Bob.

A: Is it a model(模型) car?

B: Yes, and it's a "clean car".

A: It's , How does it go?

B: It uses sunlight or .

A: That's great. The air would be clean all the cars were like it.

B: You're right, Bob.

A: Could you make one for me, Nick?

B: Sure. You'll have a one next Monday.

A: Thank you.