11. I don't know for sure.我不确切知道。
Stranger：Could you tell me how to get to the town hall? Tom: I don't know for sure. Maybe you could ask the policeman over there.
12. I'm not going to kid you.我不是跟你开玩笑的。
Karin：You quit the job? You are kidding. Jack: I'm not going to kid you. I'm serious.
13. That's something.太好了，太棒了。
I'm granted a full scholarship for this semester. B: Congratulations. That's something.
14. Brilliant idea!这主意真棒!这主意真高明!
15. Do you really mean it?此话当真?
Michael：Whenever you are short of money, just come to me. David: Do you really mean it?
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