单击此处编辑母版标题样式单击此处编辑母版文本样式第二级第三级第四级第五级单元重难点题组训练题组训练一discoverfind out与invent辨析Ⅰ.单项选择( )1.When Jack got into the classroomhe surprisingly ________ that nobody was there.A. discovered B. invented C. me