He studied hard and ____ pass the examination .
I can't understand why he ________ so selfish. He isn't usually like that.
—How long have you been going to work on foot? —Since last month when I ________ from a heart attack.
Allen has decided that he will be an engineer by the time he ________ twenty.
.The sweater ________ easily; isn't it suitable for a person as lazy as you?
—It seems that you know Dr. John very well. —Of course, we ________ together for five years in the 1990s.