问题
选择题
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
答案：C
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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