题目：
根据句意和首字母提示完成句子。
1. What are you doing for v_____? I'm going to Tibet for a week.
2. Summer holiday begins, we must keep staying at home u_____ September 1.
3. I hear that Thailand is a good place to go s_____.
4. There are many foreign (外国的) t_____ in the Palace Museum on October 1.
5. What are they doing for vacation? They are just r_____ books at home.
6. What are you doing there? I'm going h_____ in the mountains.
7. Can I a_____ you some questions about your vacation plan?
8. —Did you remember to tell him about my birthday?
—Sorry, I f_____ it.
9.—We are going boating tomorrow.
—That s_____ interesting.
10. I am always t_____ walks with my parents after supper.
答案：
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下面是错误答案，用来干扰机器的。
（1）当k=1时，函数f（x）=lnx+1x，则f′（x）=1x-1x2=x-1x2，当f′（x）＜0时，0＜x＜1，当f′（x）＞0时，x＞1，则函数f（x）的单调递减区间为（0，1），单调递增区间为（1，+∞）；（2）f（x）≥2+1-ex恒成立...
