Reading is the best way to pass time on the train.—______, I never go traveling without a book.

There a lot of farmland here. But now you can only see tall buildings.

g kites, ______ some researchers point out, can not only bring about joy to us, but also promote our physical and mental health.

He has a friend _______ father is a doctor.

There is no doubt ____ we will host the2010 World Expo successfully