题目

--Let’s go and have a good drink tonight.   --__________ Have you got the first prize in the competition? A. What for?     B. Thanks a lot     C. Yes, I’d like to.    D. Why not?   答案：A10．已知y=f（x）为奇函数，当x＞0时f（x）=x（1-x），则当x≤0时，则f（x）=x（1+x）．