此题要求改正所给短文中的错误。对标有题号的每一行作出判断：如无错误，在该行右边横线上画一个勾(√)；如有错误(每行只有一个错误)，则按下列情况改正：
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，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
Nowadays,
paper still come from trees. Unfortunately, we use a 1.
lot of paper every day. We must not waste paper and
there will 2.
not be any trees leaving on Earth. No tree means no
paper. We 3.
need 17 trees make one ton of paper. We must start
using less 4.
paper now because it takes about 100 years of a tree
to grow. 5.
How can we save paper? Firstly, we can use both the
sides
6.
of every sheet of paper. We can reuse envelope. We can
choose 7.
drinks in bottles instead of drinks in cardboard
cartoons. We can 8.
use plastic cups and plates instead of paper one. We
can also 9.
use handkerchiefs instead of paper tissues. We can use
less paper 10.
shopping bags and we can reuse these paper bags later
as well.
