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
D
解析:
略
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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
D
略