假如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：在错的词下面划一横线，并在该词下面写出改正后的词。

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。

It has been years since the Chinese get plastic bags from supermarkets for free. China has banned free plastic bags at shops and supermarkets, but people have to pay for them. The Chinese once used about 300 million of plastic shopping bags a day, which has caused environmentally pollution because plastic bags are not easy to break down. So the Chinese is encouraged to take their own bags for shopping. Then what kind of shopping bag is the best to carry? Some student in Chongqing have a extraordinary idea. They use old clothes to make cloth bags, and then to ask their parents and friends to use these cloth bags instead of plastic ones. They do so because they think it is our duty to help protecting the environment.

改善心排出量和血压的药物对心血管系统的影响主要在以下几个方面（）

A.对周围阻力血管紧张度的影响

B.对心肌收缩力的影响

C.对心脏变时性的影响

D.对心脏舒张末压的影响

E.对毛细血管紧张度的影响