.
About 71% of the earth’s surface ______ covered with water, but 20% of the world population ______ have access to safe drinking water.
| A．is; doesn’t | B．are; don’t | C．are; doesn’t | D．is; don’t |
相关试题
I am familiar with his work and look forward to of his view on literary and artistic creation.
| A．informing | B．be informed | C．being informed | D．have informed |
To read newspapers before going to bed seemed to be a rule _____.
| A．never to be broken | B．never to have broken |
| C．never to be breaking | D．to never break |
The danger of 
HINI was real, especially in the beginning, little was known about the new disease.
| A．if | B．because | C．when | D．before |
For those who don’t have to safe water, life is a constant struggle.
| A．approach | B．access | C．way | D．passage |
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