Tom goes to school ________ every day. [ ]

It is reported that people throw_____ plastic bags along this street every day.

Did they get to Beijing? —Yes,they got there_____the same day.[ ]

Open the window, please. —Certainly. Which one? _____ beside the door?

Do you mind telling us something about this area?— Not at all. ________ of the land in this area _________ covered with trees and grass.