—It______________to plant trees and grass on the hillside.—Yes. They help stop soil from being washed away.
Willie has complained to the sales manager about the PC he bought _____ screen exploded for no reason.
There is a saying that"Never put off until tomorrow what you can do today."
The growing interest in ____ history is clearly evident in ____ number of people visiting museums and country houses.
Welcome to the World Expo, which will take place in Shanghai May 1 October 31.
Both students and parents appreciate the great importance schools have to eyesight protection.