Our teacher often tells us the windows before we leave. A. closeB. closedC. to closeD. cl

问题补充：

Our teacher often tells us the windows before we leave.

A. close

B. closed

C. to close

D. closing

答案：

A. close

B. closed

(答案→)C. to close

D. closing

解析：试题分析：句意：我们的老师经常告诉我们离开之前要关窗户。告诉某人做某事用句型：tell sb.to do sth. 类似短语ask sb.to do sth.等等。故选C。