According to the data, 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．build up |
| C．make up | D．polish up |
相关试题
Large quantities of information, as well as some timely help _____ since the organiza
tion was built .
| A．has offered | B．had been offered | C．have been offered |
D．is offered |
---Mary’s score on the test is the highest in her class.
---Really? She ______ have studied very hard.
| A．may | B．ought to | C．must | D．should |
George, the lonely tortoise, was said ________ on a tiny island of Pinta in 1971．
| A．to have discovered | B．to have been discovered |
| C．having discovered | D．having been discovered |
______ left before the deadline, it doesn’t seem likely that John will finish the job.
| A．Though such a short time | B．With such a short time |
| C．Because such a short time | D．At such a short time |
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