To keep our city , we must not spit in public. [ ] A. clean B. cleaned C. cleani
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![To keep our city , we must not spit in public. [ ] A. clean B. cleaned C. cleani](/pic/43_754422.jpg)
To keep our city ______, we must not spit in public.
[]
A. clean B. cleaned
C. cleaning D. being clean
试题答案
答案:A
![To keep our city , we must not spit in public. [ ] A. clean B. cleaned C. cleani](/pic/43_754422.jpg)
To keep our city ______, we must not spit in public.
[]
A. clean B. cleaned
C. cleaning D. being clean
答案:A