How dirty your rooms are! You need to . A. put them upB. call them up C. clean them up D.

问题补充：

How dirty your rooms are! You need to .

A. put them up

B. call them up

C. clean them up

D. give them up

答案：

A. put them up

B. call them up

(答案→)C. clean them up

D. give them up

解析：句意：你们的房间多么脏呀！你需要清理干净他们。A张贴B给……打电话C清理干净D放弃，故选C。