【题目】Hearing the steps of their teacher on the floor, the students pretended ________ something attentively.
A. having readB. readingC. to readingD. to be reading
在线课程【答案】D
【解析】
试题分析：考查非谓语动词。句意：听到他们的老师在地板上的脚步，学生们假装在认真地阅读。pretend to be doing sth.假装正在做某事。故选D。