—Where___________I meet you tomorrow morning ?—I haven’t decided the place. But I’ll call you soon.

—Whose shirt is this?—It ______ be Li Lei’s. It is too big for him.

If you are in the zoo, remember not to touch or go near the animals. Although some of the animals are cute, you _________ leave them alone. 

There are no customers in the hotel. It ______ have the friendliest service.

(2013·北京东城二次联考)—________ you interrupt now？Can't you see I'm on the phone?—Sorry，sir，but it's urgent.