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高考真题 1．(2011·全国Ⅰ)They ________ have arrived at lunchtime but their flight was delayed. A. will B. can C. must D. should [解析]句意：他们本应该午餐时间到达，可是他们的飞机晚点了。can 用在疑问句和否定句中，意为：可能；must have done 表示推测，意为：一定做过；should have done 表示(过去)本应该做而没做。根据句意可知答案为D项。 [答案]D 2．(2011·全国Ⅱ)If you ________ smoke, please go outside. A. can B. should C. must D. may [解析]句意：如果你非要抽烟，请到外面去。must 用于条件句，表示“非要，偏要”。其他三项均不符合语境。 [答案]C 3．(2011·天津)I ________ sooner but I didn't know that they were waiting for me. A. had come B. was coming C. would come D. would have come [解析]句意：我不知道他们一直在等我，否则，我就会早点来了。根据 but 后面内容可知设空处表示与过去事实相反的虚拟语气，其主句谓语动词形式：would/should/could/might have done。故答案为D项。 [答案]D | 
