3. 在as…as 和not so (as)…as结构中，形容词用原级。即答案为long。

2. 在one of 后应用形容词的最高级，即the biggest。

1. 一年有四季，夏季是一年当中最热的季节，故答案为the hottest。

10. The car driver is very _______ (careful) when he is driving.

【答案详解】

9. He is _______ (old) of the two brothers.

8. Things are much _______ (light) on the moon than on the earth.

7. The people’s life in Southern Africa is getting _______ and _______ (bad).

6. The more, the _______ (good).

5. I think English is _______ (interesting) than math.

4. Who is _______ (tall), the girl or the boy?