问题补充：
Look! Emma is her bedroom. Her room is always.
A. clean, clean
B. clean, cleaning
C. cleaning, clean
D. cleaning, cleaning
答案：
A. clean, clean
B. clean, cleaning
(答案→)C. cleaning, clean
D. cleaning, cleaning
解析：句意:看,艾玛正在打扫她的房间.她的房间总是很干净.clean既可以用作动词,意思是打扫.也可以用作形容词,干净的.故选C.
