The train is to start soon and Mary hasn’t turned up． What _____ have happened to her?
A．can
B．might
C．may
D．should
A
题目分析：考查情态动词表示推测。Can have done可能做了某事；might/may have done也许做了某事；should have done本不应该做某事；句意：火车就要出发了，Mary仍然没有出现。她可能发生了什么事情呢？根据句意是对过去发生的事情的推测。故A正确。
点评：本题考查了其它动词表示推测的用法。如果是对过去发生的事情进行推测，使用“情态动词+have done”如果是对现在的情况进行推测，使用“情态动词+动词原形”构成。同时要注意情态动词表示虚拟语气的用法。
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| "I've been writing a book, John. Do you think anyone would be interested in reading it?" said the old lady. John took over the papers from her shaking hand and 1 her in chair. He remembered her rich 2 in the early days of the Old West. He looked through the papers. "It's good, Grandma," he said gently. Then 3 that she couldn't hear him, he shouted into her ears,"I think it's very good. I'll send it to a publisher." The days later, he reported that the publisher had had time to read only a few 4 . But he was so impressed (留下深刻印象) that he had sent $ 100 for an option (版权). More money would be given as an advance (预付款). Every month John 5 $100 for her with a letter from the publisher telling about the progress of the book. One morning, three months after her 100th birthday, Grandma didn't get up. The doctor told her that she couldn't 6 more than a few days. She was ready to go, but she first wanted her book to be in print. John promised that she could get it very soon. Grandma 7 on until the day the book came into her hands with the title and her name on the cover. 8 she couldn't see it, she could touch it. She 9 traced (探查) her name with her fingers, tears in her eyes. Two hours later, she died peacefully, 10 holding her book. Her granddaughter took up the book and opened it. "Why, it's just blank pages!" she cried in 11 . John's face turned red. Then the girl understood. There never was a book. Grandma couldn't hear the little bell when the typewriter came to the end of the line. She would keep on working, not 12 the whole sentences and sometimes the paragraphs were missing. John did not tell her, for he couldn't take away her only hope. It was John himself who had written the letters and sold his car to pay the advance. | ||||
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