—Where is Sally?—I’m not sure. She      in the library.

--Whose T-shirt is this? --It ____ be John’s. It’s ______ small for him. 

—Can I tell Peter about the news?—No, I don’t want anyone else to know it. You _______keep it to yourself.

Being examined twice a year, whether it is a car or a bus or a truck, it is the rule that every driver____ obey in this city.

I ______have come here in time, but I met an old friend of mine. I stopped and talked with him for some time.