We have only one Earth. It’s our common _.
— Could you tell me _______in your hometown in winter? — Sure.
— We’ll visit the Summer Palace_______ there is a heavy rain tomorrow. — OK! Boating on the lake must be great fun.
— There are so many problems. I’m so afraid. — You should try to ______your shyness first. You’re not a child any more.
—Do you know the girl_______ with our English teacher often? — Yes, her name is Helen.
—I called you at 4:50 yesterday afternoon, but no one answered. —Sorry. I_______with my friends at that time.