—I’ve been invited to a department party tonight. Are you going to come?— Oh, I’d really like to, but I have a ton of work. ___________________.
—Excuse me.Is this the right way to the Summer Palace? —Sorry, I am not sure.But it _______ be.
You _______ be tired—you’ve only been working for an hour.
The engineers must have worked out the design by the end of last week,_______?
It rained a lot during their journey,so they _______ have had a good time.
—Isn’t that Ann’s husband over there? —No, it _______ be him—I’m sure he doesn’t wear glasses.