英语作文great changes in shanghai

高中水平：Shanghai is one of the largest city in China.Many famous buildings and bridges have been built here.Besides,great changes have taken place in Shanghai's transportation.Compared to what it was ten years ago,many streets have been widened.So buses and cars can go more quickly than before.nowadays,we have two underground lines and many more are being built.With the development of science and technology,Shanghai will become better and better.