---What’s ______population of China?---China has_____ population of 1.3 billion.

 I tried phoning her office, but I couldn't ________.(2009·全国Ⅰ)

Walking alone in the dark，the boy whistled to ________ his courage.

In order to reduce   air pollution, many people want  a total _____on the playing of firecrackers (鞭炮)in many cities during the Spring Festival.

Modern furniture would be ____ in a Victorian house．