________，he talks a lot about his favorite singers after class.
A．A quiet student as he may be
B．Quiet student as he may be
C．Be a quiet student as he may
D．Quiet as he may be a student
________ and we’ll get everything ready for the taking off.
A．Have one more hour
B．One more hour
C．Give one more hour
D．If we have one more hour
Not until we have had a chance to discuss it thoroughly ________ perfectly.
A．the problem has been settled
B．has the problem been settled
C．will the problem be settled
D．the problem was settled
—Have you been to the Great Wall?
—Perhaps not in my memory.________，it might have been during my early childhood.
A．If any B．If so
C．If ever D．If not
More than a dozen students in that school ________ abroad for further study every year.
A．sent B．are sent
C．have been sent D．have sent
—Mum，I am afraid I won’t do well in the coming test.
—Honey，________more careful，________you will make it.
A．is；so B．be；and
C．be；then D．being；and
