With trees and grass_____ about 35％ of the urban area，the city of Hefei has taken on a new look.

This is _____ third year that China has taken part in the activity Earth Hour. But we hope we can try our best to make the earth ____better world.

ire this family, ______the parents treat their child like a friend.

It is impossible for____________ littleroom

___, sir” “No Go ahead”