—Tom must be at home because the light in his house is on.—He ____ be at home, because I saw him playing basketball on the playground.A. must B. can’t C. mustn’t
He the book to the library if he it tomorrow.
We some robots in the next few months, and there some in the office, too.
Beijing a lot in the past ten years. Now it has become one of the biggest modern in the world.
---Let’s go fishing if it ________this weekend. ---But nobody knows if it ___________.
I didn’t hear the phone because my father__________TV then.