Cycling can see the scenery along the way这个是典型的中国式英语问题,不是cycling can see 而是 BY/ In the cycling we can see
Secondly,riding a bike not only exercise our bodies but also help us relax and relieve the pressure from work and study.这句中 如果你不打算假助动词的话 那么要在exercise和help后面加上s 个人建议这句话改为 Riding a bike would do for our exercises as much as for the relaxing and reliecing from the work and study.
第三句的do 最好改为may 用 do 一是过于觉得 而是别扭.其实needn't也是个好选择、
最后一句 可以这么写 If you are on a bicycle,you needn't worry about the traffic jams and being later for the important things,since you can go through the streets freely with your bike.