8．The guesthouse stands in picturesque s________.

7．I paid the bill and he gave me a r________.

6．He managed to o________ the difficulties and reached the top in the end.

5．To our great surprise，the naughty boy apologized to me this time ________(真诚地)．[]

4．One cannot have ________(智慧) without living a life.

3．The ________(随便的) newspaper reader wouldn’t like long articles on serious subjects

every day.

2．His brother works in the foreign ________(部门) of the company.[

1．Their new pool made them the ________(羡慕) of their neighbors.

22. (本小题满分14分)

已知，函数．

(1)若函数在区间内是减函数，求实数的取值范围；

(2)求函数在区间上的最小值；

(3)对(2)中的，若关于的方程有两个不相等的实数解，求实数的取值范围．

21. (12分)设函数(、为实常数)，已知不等式

对一切恒成立.定义数列：

(I)求、的值；

(II)求证：