China supplies more than 90 percent of the world’s rare earth metals, but its reserves only ________ about one-third of the world’s total.
A. take up B. make up
C. build up D. set up
--- It is selfless _____ the doctor to devote all the time he had for the patients.
--- I think so, they are so great.
A. for; to care B. of; to care
C. for; to caringD. of; to caring
_____not only Jim but also his parents _____ a few places of interest since they came to China?
A. Has; visited B. Will; visit
C. Have; visited D. Did; visit
---It’s 12 April today. Have they found any useful information about the plane's black box?
---Flight MH370? Yes, but it’s difficult to decide where the black box really is.
A. still B. ever
C. yet D. never
______ I have a quick word with you? Something important has happened.
A. Must B. Could C. Would D. Should
