—What do you need to say?—No person         smoke or carry a lighted cigarette in this special room.

For the safety, everyone _________ obey the traffic rules when he is driving or walking.

Mike ______have stolen the money from the bank,______he appeared to be rich overnight.

—How many students are there in your school?—      the students in our school      over two thousand. 

—Amy , I would like your uncle to help me repair the computer. —Sorry, he _____help you today . He won’t come back until tomorrow.