【題目】If there are ______ trees, the air in our city will be _______ cleaner.

A. less, more B. more, more

C. more, much D. much, more

【答案】C

【解析】試題分析：句意：如果這有更多的樹，在我們城市里的空氣將會更干凈。此題考查比較級。根據(jù)句意，應選B。

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