—What did you do last weekend?—Oh,nothing________.
The new law states that people ________ drive after drinking alcohol.
—Good morning. I've got an appointment with Miss Smith in the Personnel Department.—Ah, good morning. You ________ be Mrs. Peters.
It ________be the postman at the door.It's only six o'clock.
It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
—What are you doing this Saturday?—I'm not sure, but I ________ go to the Rolling Stones concert.