一段很烂的英语,请修改下

In my opinion, the number of China's bicycle will remain the same for long times. Althouth it may be replaced by car, bus and other kinds of transportation in some developed countries in China, it has been been brought into wide use in the developing areas in China. As a result, the number of bicycles in China will keep constant as same as now. Moreover,I believe that it will go up in quality.

I think the number of bicycles in China will remain constant, because they will be replaced by cars, busses and other vehicles in some developed areas of China,and they will be made in a wide variety of usage in the developing areas of China. The number of bicycles in China will remain the same, but the quality of it will increase.

我在外国留学很多年了， 保证对！

I think China of handlebar population will is for long-term the performance keep.Because its will replace to embark a car, a bus with such in somely development of at China of district up, with its will is manufacturing a