—Jim, what are you _______?—A dog. It is playing with a ball on the floor.
— You should go over your test paper ________ you hand it in.— OK, Mr. Wang.
— Let’s go hiking _________ staying at home, shall we? — Good idea.
— ______ is the library from our school?—It’s quite near. Just go ________ the road.
— Can you tell me ____________?— It happened at 3:00 pm.
— TV was invented in _________ century.— Is that true?