用所给词的正确形式填空 。

1. How long              he              (read) English every night?

2. I have some              (knife). I can lend one to you.

3. My brother often goes to school without              (eat) breakfast.

4. Before, Kitty seldom               (have) fruit and vegetables.

5. Would you like               (buy) fish？

6. I play computer games              (two) a week.

7. My teacher says it is very important              (sleep) well before an exam (考试).

8. Those              need a lot of time              every day. (dance)

9. The fish is too              (salt). I don't want to eat it.

10. Daniel usually              (have) meat and vegetables for dinner now.

在充分的润滑条件下，摩擦表面间有边界膜和流体膜，摩擦发生在润滑剂的膜内，（）最小，摩擦表面的（）也最小。

A．摩棒／损伤

B．摩擦程度／磨损

C．摩擦系数／磨损

D．摩擦系数／损伤