—Look at the man in the classroom! Is he Mr. White?—No, it __________be him. He’s eating in the dining hall.
We have never seen __ _ film before. It's very interesting.
ORBIS uses a flying eye hospital______________ poor countries, right?
Tom ______ go to bed late, but now he _______ to bed early.
I think _____________ necessary to do some morning exercises every day.
Don’t _____________ the disabled persons. We should help them.