_______ done for us?
One of our rules is that every student ________ wear school uniform while at school.
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.