I． 根据句子意思和首字母提示，补全单词。

1.       A thousand kilograms of r______ paper saves seventeen trees!

2.       There is something wrong with the roof. The rain is l_______ in.

3.       She thinks holidays are a w________ of time and money.

4.       Don’t throw any l______ onto the ground.

5.       He is s_______ his foreign stamps.

II. 用所给单词的适当形式填空。

1.       The story is _______ (interesting) than that one.

2.       You must keep your room _______ (clean).

3.       Yesterday, I ______ (repair) a bike. It _____(need) a new wheel.

4.       There are at ______ (little) 1000 people standing at the gate of the school.

5.       About ten ______ (present) of packaging is plastic.

6.       Do you collect waste paper for ______ (recycle)?

7.       Plastic is ______(little) th an mental, and paper is ______ (much) than metal. That is to say paper is _____(much).

8.       My mother was ______ (mend) some old socks. They had holes in them.

9.       I think she’s already finished ______(cook).

10.   Jenny has ______(empty) one bag of rubbish onto the floor.