根据句子意思，用括号中所给汉语提示或英语单词的适当形式填空。在答题卡标有题号的横线上，写出空缺处所填单词的正确形式。（每空一词）
It’s quite necessary to keep away from the        (pollute) rivers.
I found many pieces of paper were        (spread) on the floor when I entered the classroom.
      (what) he says, I won’t believe him.
Tomorrow I will be the        (proud) of our school.
He felt       (true) sorry that he hadn’t helped the old man up who fell down in the street.
You will be late for the meeting        (除非)you take a taxi.
Making our city more and more beautiful is every         (公民) duty.
There are many old        (家具)for  into several times. (break)
He spent 20 yuan       (租用) a bicycle to ride around Yangzhou.
A lot of       (人造的)satellites have been launched into space recently. .