4、My wallet is nowhere to be found. I ___ when I was on the bus. A. must have dropped it B. must drop it C. should have dropped it D. ought to have dropped it 5、"She must be in the dormitory now." "No, she ___ be there. I saw her in the classroom...
更多内容请点击：成人学士学位英语考试冲关指导7 推荐文章