A moment, please．I’m checking if Mr. Smith _________ free tomorrow．

Don’t look out the window in class. [ ]

_____ of the land in that district ______ covered with trees and grass.

I can’t find my favourite magazine. Have you seen _________?—Jack went away with _________ just now, but I’m not sure whether it’s yours.

The Great Wall is _____ the north of China.[ ]