—The charity walk begins _______ 9.00 a.m. Don’t be late. —No problem.
When he walks_______ my desk,he knocked my books________ the floor.
--The World No Car Day is ________ September 22nd. --Yes, many volunteers ride along the street to ask people to stop car.
It is said that_______ Tian'anmen Square is _______biggest city square in the world.
—Hi, Millie. This is my sister, Sandy.—_________
My grandfather __________ old friends here.