短文改错（共10小题；每小题1分，满分10分）　
以下标有题号的每一行均有一个错误，请找出，并按下列情况改正：此行多一个词；把多余的词用斜线（\）划掉，在该行右边横线上写出该词，并也用斜线划掉。此行缺一个词：在缺词处加一个漏字符号（Λ），在该行右边横线上写出该加的词。此行错一词：在错的词下划一横线，在该行右边横线上写出改正后的词。
Unlike many other places, our hometown is also facing             76._____
the problem of pollution. Unfortunately, people here have           77._____
realized the importance of protection the natural environment.      78._____
Factories have been taken measures to stop pouring polluted         79._____
water into the rivers. The citizens not longer put waste, such       80._____
as rubbish or human waste into the rivers. Every year,               81._____
a great number trees are planted. As a result,                       82._____
the water in the rivers are becoming cleaner and cleaner.            83._____
The hills around the city were covered with green trees              84._____
and the air here is much more fresher than before.                    85._____