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（∧），在该行右边横线上写出该加的词。
此行错一个词：在错的词下划一横线，在该右边横线上写出改正后的词。
注意：请在答题卡上作答。
We live on the earth, but we are not alone in the world.
Everyone know we should keep the balance of nature,            ____________
or we don’t always do as we say .                         ____________
A species can become endangered with different reasons.       . ____________
But the very important one is their living places are ruined. We       ____________
cut down trees without plant new ones, and we pollute the place     ____________
where animal live. Because of this, they have no home and       ____________
they are going to be die out.                                  ____________
Other reason is money. Many tigers are killed by those        ____________
who want to sell our fur and use their bones for medicine.       ____________
We should do everything which can be done to change the         ____________
situation, or wild animals can only exist in our memories.