I have to well prepare for the math test tomorrow because it ______ 30% of the final exam.

Are Mr. and Mrs. Wang living alone in the house? —Yes, they have three sons, but ______ of them live in their own houses.

Must I finish my homework tonight?-No, you______.

Some foreigners will visit our school tomorrow.—Great! It’s ______to tide up our school now.

Must I stay here with you?—No, you_____. You may go home, but you ______go to the net bar.