Mrs. Scott prefers a street in a small town to _________ in such a large city as Shanghai.

--- You often talk with your classmate on the telephone or mobile phone? --- _____． I like using QQ．

The population of China is larger than ______ of any other country in the world. 

When you go by train, please see to it_______ you take an express, _______ that stops only at big stations.

—How many students passed the math test? — ________, for it was too much for them.