The situation is hard to _______, because he isn’t a man easy to _______.
—What ________ an important part in their lives?—Friends.
He wouldn’t leave the TV set, ______ he was going to have an important exam the next day.
As soon as she saw her boyfriend, she ________ crying.
—May I ask a question after class,Sir?— , but not during my lunch break.
The scientists have made _______ possible for us to communicate with each other more easily.