第26题: [单项选择]冷哮之痰是:() A. 痰少粘稠难出 B. 痰如白沫量多 C. 痰稠黄胶结 D. 痰稀薄多沫或痰多而粘 E. 痰脓腥臭 参考答案:D
第27题: [单项选择]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: 参考答案:A 答案解析:[解析] 本题测试情态动词。“must have done”表示对已发生的事情进行肯定推测。本句的意思是:“我的钱包找不到了。我一定是在公共汽车上掉的。”