单项选择。—Who'ssinginginthegarden?—It 国语站 题库 2.46W 大中小设置文字大小 问题详情:单项选择。—Who's singing in the garden?—It ________ be Mr. Brown. He always practices singing at this time.A. must B. can't C. need D. mustn't【回答】A知识点:情态动词题型:选择题 TAG标签:单项 #