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 |
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 |