They were talking about the persons and things _______ they saw in the factory.
A. which B. that
C. what D. they
Not only the students but also their teacher_______ the Great Wall before.
A. have been to B. has been to
C. has gone to D. went
It is impossible for ______ little children to do ______ much work within 20 minutes.
A. so, so B. so, such
C. such, so D. such , such
He has spent as much time as he has _______ English in the morning.
A. to read B. to reading
C. read D. reading
We're not sure if it _______ tomorrow. If it _______, we won't go hiking.
A. will rain; rains B. will rain; will rain
C. rains; rains D. rains; will rain
His father has been _______ for three months because of the theft.
A. in prison B. in the prison
C. in a prison D. in prisons
