题目

They are talking about the moon           they had been there for years.A. as though        B. even if              C. like           D. because 答案：A解析:as though接从句时从句用虚拟语气。答案:A人在平直马路上正行走时，使人前进的力的施力物体是（　　）A．人B．脚C．地面D．空气