Unfortunately he fell over some bricks ________ lying on the ground.
A.leftB.having leftC.leavingD.to leave在线课程B
解析：
分析句子结构可以知道some bricks后面应该是个定语，leave后面可以跟复合宾语，leave sb./ sth. doing表示“使某人／某物保持某种动作／状态”，本题中的some bricks是leave的宾语，因此过去分词作定语表示被动，而且用完成时态来表示动作发生在fell over这一动作之前，having left = which have been left．