We should keep the door and the windows to get quiet because it’s too noisy outside.A. op

问题补充：

We should keep the door and the windows to get quiet because it’s too noisy outside.

A. open

B. opened

C. closed

D. close

答案：

A. open

B. opened

(答案→)C. closed

D. close

解析：open打开；close关闭。句意：为了保持安静，我们应该关上门窗，因为外面太吵了。结合语境可知选C.过去分词作宾语补足语表示被动的动作，和被修饰词是动宾关系。故选C。