题目内容：

Dear human beings,

   Hi! I’m 80 years old now. So I’ve seen ______ of the world. We’ve lived on Earth with you thousands of years. Each day we release(释放) O2 and remove harmful gas so that you have fresh ______; we help prevent the Earth’s soil（土壤）from being washed away, and above all, we give all kinds of fruits, nuts, beans as well as ______ to you.

   We are now in great ______ because of you. You are killing us at a terrible speed. You are burning and cutting down millions of us each year, but you’re not _____ enough. For every tree being planted today, 30 trees are being cut down. What would you do if all of us ______? Perhaps you would die, too.______ us, you wouldn’t get enough material for buildings, furniture（家具）, paper products, and your cities would ______ugly. Moreover, air pollution and noise pollution would become more and more serious, and your life would become nasty.

   The ______ thing for you to do now is to stop your bad manner. We are the best fighters _____ pollution and we are your best friends!  

                                                       Your friend,

                                                          An old tree

1.A. some    B. many    C. most    D. much

2.A. water    B. air    C. food    D. oil

3.A. wood    B. cool    C. green    D. home

4.A. situation    B. condition    C. need    D. danger

5.A. growing    B. saving    C. planting    D. producing

6.A. left    B. refused    C. died    D. won

7.A. With    B. Without    C. By    D. Between

8.A. look    B. seem    C. smell    D. fall

9.A. everyday    B. best    C. last    D. polite

10.A. for    B. from    C. against    D. off