You should keep the window because the room is so hot and damp.A. openB. closedC. openedD

问题补充：

You should keep the window because the room is so hot and damp.

A. open

B. closed

C. opened

D. close

答案：

(答案→)A. open

B. closed

C. opened

D. close

解析：A 根据句中的“hot and damp”得知，应该“开着”窗户，故选A。open在此为形容词“开着的”。