Either side seems to have a(n) _________ position; there are still many uncertainties on this issue.
A. ambiguous B. delicate C. explicit D. confidential
Though scientists get closer to understanding why we age， the reason for different aging rates among individuals remains only __________ understood．
A.concretely B.thoroughly
C.vaguely D.flexible
—Didn’t you have a good time at the party?
—Of course I did.As a matter of fact,I had such fun that time seemed to_____so quickly.
A.go by B.go away
C.go out D.go over
What shall we use for power when all the oil in the world has been _____？
A.given out B.put out C.held up D.used up
His idea of having weekly family meals together，which seemed difficult at first，has ______ many good changes in their lives.
A.got through B.resulted from C.turned into D.brought about
She ________ Japanese when she was in Japan. Now she can speak it freely.
A.picked out. B.made out C.made up D.picked up
