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 题目和参考答案——青夏教育精英家教网—

题目内容

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

解析

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