【GMAT考满分语法SC题库】_真题_答案

题目内容

Encompassing nearly a third of the planet’s land surface, forests perform a vital function in sustaining the conditions for human life in cities, maintaining air quality by ridding the atmosphere of excess carbon, and ensuring consistent global temperatures through the storage of greenhouse gases.

A
Encompassing nearly a third of the planet’s land surface, forests perform a vital function in sustaining the conditions for human life in cities, maintaining
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B
Encompassing nearly a third of the planet’s land surface and performing a vital function in sustaining the condition for human life in cities, forests maintain
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C
Forests encompass nearly a third of the planet’s land surface and perform a vital function in sustaining conditions for human life in cities, and by maintaining
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D
Forests encompass nearly a third of the planet’s land surface, perform a vital function in sustaining the conditions for human life in cities, and maintain
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E
Forests encompass nearly a third of the planet’s land surface, performing a vital function in sustaining the conditions for human life in cities, and they maintain
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正确答案: A

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