If you want to keep your room clean and tidy,it（C）every day.A. must clean B. will be cleaned C. should be cleaned D. is cleaned这是原题，是一个建议性的条件句，后面应该用should或者had better+动词原形，但是这句的主语是it，既是房间，所以应 展开
If you want to keep your room clean and tidy,it（C）every day.A. must clean B. will be cleaned C. should be cleaned D. is cleaned这是原题，是一个建议性的条件句，后面应该用should或者had better+动词原形，但是这句的主语是it，既是房间，所以应该用被动语态，should be cleaned，应该被打扫。 收起
