—Listen! There is a knock on the door.Who _____ it be?—It must be Jack.Just now I sent for him.
Mr. Green has never smoked any more since his wife _____ him to give it up.
Lily’s shyness puts her at a ____ in her company.
They are the __ who __ Wuhan University and now are playing an important part in our factory.
During the war, people here _____ much pain.
The question of drug-taking is bound to (一定要) _____ at the next conference.