利用细菌来净化污水的主要原理是（　　）

A．细菌可分解污水中的一些有机物

B．细菌可吃掉污水中的无机物

C．细菌喜欢喝大量的水

D．利用污水来繁殖细菌

用括号内所给动词的适当形式填空。（本大题共8小题，每小题1分，共8分）

小题1:Jane is such a kind girl that she always             (reply) to anyone with a smile on her face.

小题2:By the end of the 20th century, the weather            (affect) people’s life a lot.

小题3:I’m surprised to find that the price of bread             (rise) by 15% recently.

小题4:Have you ever thought about devoting all your life to             (support) different charities?

小题5:It’s said that women in Kingdom of Saudi Arabia (沙特阿拉伯)            (not allow) to drive all

the time.

小题6:Though there’s enough time, I prefer          (complete) the task quickly first to spend more time on

my hobbies.

小题7:— Mary, could you help me?

— Wait a moment. I        (argue) about what colour to wear at tonight’s party with my elder sister.

小题8:The notice says that anyone who breaks the school rules            (punish) by our principal.