题目

Jim talked for about half an hour yesterday.Never＿＿＿＿＿ him talk so much. A.I heard B.did I hear C.I had heard D.had I heard 答案：D“补钙新观念，吸收是关键”。小丽的妈妈一直给她吃钙片，医生却说小丽缺钙，建议给小丽增服A．维生素A B．维生素B C．维生素C D．维生素D