问题
选择题
The ____________ (天空) is blue. The air is ____________ (干净的). [ ]
A. clean, sky
B. cloud, clean
C. sky, clean
答案
答案：C
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The ____________ (天空) is blue. The air is ____________ (干净的). [ ]
A. clean, sky
B. cloud, clean
C. sky, clean
答案：C
