情景对话与语篇 — 英语选择题

看对话，选择能使对话通顺的一项。 Amy: It's dark in the classroom. Ben: Let's ____. Amy: Now I can see the blackboard. It's dirty. Ben: Let's ____. A. turn on the light; clean the blackboard B. clean the blackboard; turn on the light C. open the door; clean the window D. clean the window; open the door