A. effects; affect    
B. affects; effect  
C. affects; affect    
D. affect ; effect

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文.文中共有10处语言错误,每句中最多有两处.每处错误仅涉及一个单词的增加、删除或修改.
增加:在缺词处加一个漏字符号(?),并在其下面写出该加的词.
删除:把多余的词用斜线(\)划掉.
修改:在错的词下划一横线,并在该词下面写出修改后的词.
注意:
1.   每处错误及其修改均仅限一词.
2．只允许修改10处,多者(从第11处起)不计分.
Nowadays,paper still come from trees. Unfortunately,we use a lot of paper every day. We must
not waste paper and there will not be any trees leaving on Earth. No tree means no paper. We
need 17 trees make one ton of paper. We must start using less paper now because it takes about
100 years of a tree to grow. How can we save paper? Firstly,we can use both the sides of every
sheet of paper. We can reuse envelope. We can choose drinks in bottles instead of drinks in
cardboard cartons. We could use plastic cups and plates instead of paper one. We can also use
handkerchiefs instead of paper tissues. We can use less paper shopping bags and we can reuse
these paper bags later as well.

A. governs                          
B. governor      
C. government                        
D. rule

A. Now that
B. For
C. Although
D. As soon as

A. Now that
B. unless
C. Before
D. As a result

A. after
B. unless
C. until
D. when

A. Now that
B. So
C. Although
D. As soon as

A. Now that
B. After
C. Although
D. As soon as

A. so that
B. even if
C. as though
D. now that