Giúp mik  Rewrite 1. What is the population of Hanoi? -> How……………………… 2. The camera is very expensive. -> The camera…………………… 3. There are six billion people in the world. -> The population ………………………… Thanks

1. What is the population of Hanoi?

-> How many people are there in Hanoi ?

2. The camera is very expensive.

-> The camera is not cheap

3. There are six billion people in the world.

-> The population in the world is six billion people