------Is this ruler Mary’s?------No, it _______Mary’s. Hers is on the desk..

According to the traffic rules, you _________ wear the safe belt while you are driving.

—Mom, can I have that transformer?—Behave yourself and you____ have it．

Those who failed to get into the art exhibition ________ disappointed as many of the artists who should have appeared did not come. 

----____ I take the book out? ---- I’m afraid not.