____ the rising birth rate and immigration, the declining death rate also ____ the population growth.

There is __________ “c” and _______“l” in the word “colour”. an, an

When his father started questioning his explanation, he had to ____ more details for his mistakes.

Beijing is the capital of China and it isone of ______ cities in the world.

My hometown is becoming more and more beautiful with trees and flowers on sides of the road.