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。

删除：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 the electric bicycle is developing fast many kinds of that can be seen on the

road. It is popular with more and more people. Why? The reasons are simply.

First of all it is much convenient than taking a bus or taxi. What's more important is that it

saves strength and goes fast so the rider feel less tired. Also it is easy of anybody to ride

whether old or young. Finally it is not only energy-saving but also environmentally friendly.

Every coin has the two sides. The electric bike also has it’s disadvantages. On the one hand the

rider may lose the alternative to be physical involved while riding which is not beneficial to

health. On the other hand it may also lead to more traffic accidents. Personally the electric

bicycle does our more good than harm. As long as the rider drives carefully the number of

 accidents can greatly reduced.