一个初三英语补全对话A：（ ）?B：China has the largest population in the wo

A：（ Which country has the largest population in the world
B：China has the largest population in the world.
A：（ What's the population in China
B：About 1.3 billion.
A：What a large population!（It's bad to have so large population
B：Of course it’s bad.The large population has brought us lots of problems.
A：（ Is it slowing down
B：Yes,but it is slowing down.
A：（ Why is that
B：Because our government has already carried out many policies to control the population.