1 . The teacher asked us to s________ (总结) the main points of the text in three sentences. (根据中英文提示填空)

2 . There is no enough water to_____(漂浮)the ship. (根据汉语提示单词拼写)

3 . The strategy is used _______(work) out the problem. （所给词的适当形式填空）

4 . There is an urgent need to take action to m______ (维持) the sustainable growth of ecosystem. (根据中英文提示填空)

5 . The meeting aims to p______(促进) the partnership between two countries. (根据中英文提示填空)

6 . It needs skills to m________(保持) friendship with your friends over the years. （根据中英文提示填空）

7 . I like getting up very early in summer. The morning air is so good ________(breathe).

8 . Nowadays people sometimes separate their waste to make it easier for it_________

A．reusing

B．reused

C．reuses

D．to be reused