Chọn $\text{C.It is more difficult to walk to somewhere.}$

Dữ kiện chính: Tokyo is different from London when you want to walk to a place.

Dữ kiện phụ (bổ trợ dữ kiện chính): During the day, most people travel to work by train. Tokyo people buy six million train tickets every day. Although they are usually crowded, Japanese trains are very good. They always leave and arrive on time. On a London train, everybody in a seat seems to be asleep, whether the journey is long or short. They worst time to be in the street at night is about 11.30 when the nightelubs are closing and everybody wants to go home.

Tokyo is different from London because: C. it is more difficult to walk to somewhere. (Tokyo is different from London when you want to walk to a place)