You shouldn’t leave the door when you go out.A. closeB. closingC. openD. opening

问题补充：

You shouldn’t leave the door when you go out.

A. close

B. closing

C. open

D. opening

答案：

A. close

B. closing

(答案→)C. open

D. opening

解析：句意：当你出去时，不应该让门开着。使……处于某种状态，用leave+宾语+形容词作宾补，所以选C, open,adj. 开着的。