—Who______ it be that is knocking at the door?—It ______ be Father, but I’m not sure.A. can; must B. can; may . must; can D. may; must
—Where’s __________ nearest bookstore? —There’s one at __________ end of the street.
I earn 10 dollars __________ hour as __________ supermarket cashier on Saturdays.
It is not rare in __________ that people in __________ fifties are going to university for further education.
If the manager had to choose between the two, he would say John was __________.
Five years ago her brother was __________ university student of __________ physics.