下面说法不正确的是[ ]

A．三角形的面积一定，底和高成反比例

B．长方形的周长一定，长和宽不成比例

C．订阅《少年报》的份数和总钱数成正比例 

D．因为圆周长C= πd，所以π与d成反比例

用所给单词的适当形式填空。

1. Mum wants me _______ (drink) milk every day.

2. Bill likes _______ (play) basketball.

3. I try _______ (be) a good student.

4. Katrina often helps Bill _______ ( study) English.

5. You must _______ ( finish) your homework.

6. There is much _______ ( milk) in the bottle.

7. There are some _______ ( vegetable) in the basket.

8. Most students have good _______ (habit).

9. I have a _______  (difference) idea.

10. Lin Ying reads English books _______ (two) a week.