词汇（注意用正确的形式填空）。

1. The old man _____ (锻炼) every morning.

2. I often _____ (购物) on weekends.

3. We must _____ (保持 ) our classroom clean.

4. There are some _____ (不同) between the two pictures.

5. He _____ (几乎不) goes to restaurant for dinner.

6. Katrina doesn't often ______ (喝) coffee, she likes green tea.

7. My eating ______ (习惯) are not very good.

8. Everyone must ______ (设法) to work hard.

列宁说：“辩证法的特征和本质的东西并不是单纯的否定，并不是任意的否定，而是一个辩证否定的过程。”辩证的否定就是（）

A、事物自身的否定

B、否定一切

C、外力作用的结果

D、蔑视权威，不相信书本