—How long in America?
—Two years. I came back last month.
A．have you studied B．do you study
C．would you study D．did you study
What will we do when all the oil in the world has ?
A．run out of B．been given out C．been used up D．given off
She was a person and wouldn’t let anyone or anything stop her.
A．reliable B．determined C．stubborn D．concerned
So clearly English that he can always make himself understood.
A．he speaks B．he spoke C．did he speak D．does he speak
Some research workers completely all those facts as though they never existed.
A．refuse B．miss C．leave D．ignore
some of the beer here— perhaps you will enjoy it.
A．Try B．Trying C．To try D．Have tried
