情态动词表推测专项练习 1. Look! The light is out in her room. She ———— to bed already. A. must go B. had to go C.must have gone D.has gone 2. We had a wonderful time yesterday. You ———— .Why didn't you come? A. had to come B.should have come C.might have come D.must have come 3. ─There were already five people in the car but they managed to take me as well. ─ It______ a comfortable journey. A. can't be B. shouldn't be C. mustn't have been D. couldn't have been 4. My sister met him at the Grand Theatre yesterday afternoon, so he ___ your lecture. A. couldn't have attended B. needn't have attended C. mustn't have attended D. shouldn't have attended 5. I was really anxious about you. You _____ home without a word. A. mustn't leave B. Shouldn't have left C. Couldn't have left D. needn't leave 6. Oh, I’m not feeling well in the stomach,I_____ so much fr chicken just now. A. shouldn’t cut B. mustn’t have eaten C. shouldn’t have eaten D. mustn’t eat 7. Mr.White _____ at 8:30 for the meeting, but he didn’t’ show up. A. should have arrived B. should arrive C. should have had arrived D. should be arriving 8. You ______ be tired - you've only been working for an hour. A. must not B. won' t C. can' t D. may not 9. - Isn' t that Ann's husband over there? - No, it _______ be him -I'm sure he doesn't wear glasses. A. can't B. must not C. won't D. may not 10. There ____ be any difficulty about passing the road test since you have practised a lot in the driving school. A . mustn’t B. shan’t C. shouldn’t D.needn’t 11. I was on the highway when this car went past followed by a police car. They ______ at lease 150 km an hour. A. should have been doing B. must have been doing C. could have done D. would have done 12. He _____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside. A. should B. must C. wouldn’t D. can’t 13. ---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.---- Oh, dear! She _______ a lot of difficulties! A. may go through B. might go through C. ought to have gone through D. must have gone through 14. This cake is very sweet. You __________ a lot of sugar in it. A．should put B．could have put C．might put D．must have put 15. —Catherine, I have cleaned the room for you.
—Thanks. You it. I could manage it myself. A．needn’t do B．needn’t have done C．mustn’t do D．shouldn’t have done 16.—Tom is never late for work. Why is he absent today? —Something ________ to him. A．must happen B．should have happened C．could have happened D．must have happened The Uniqueness of Finger-prints （指纹的唯一性） 难度：＊＊＊＊ 词数：266 标准时间：6 分钟 ① 完成时间：______ 正确数：______ Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable. Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the case. The ridge structure on a person’s fingers does not change with growth and is not affected by surface injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time ② by new one, which bears a reproduction of the original pattern. It is only when the inner skin is injured that the arrangement will be destroyed. Some criminals make use of this fact to remove their own finger-prints but this is a dangerous and rare step to take. Finger-prints can be made very easily with printer’s ink. They can by recorded easily. With ③ special methods, identification can be achieved successfully within a short time. Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case. A suspected man may deny a charge but this may be in vain. His finger-prints can prove who he is even if his appearance has been changed by age or accident. When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect with the naked eye. Special techniques are used to “develop” them. Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained. ( ) 1. Scientists and experts have proved that the pattern of a human being’s finger skin ________. A. is similar to his mother’s B. is valuable to himself only C. is like that of others with the same type of blood D. is different from that of all others ( ) 2. If your fingers are wounded by knife, fire or other means, the structure of skin will ________. A. be changed partly B. be replaced by a different one C. be the same when the wound is recovered D. become ugly ( ) 3. Some criminals remove their own finger-prints by ________. A. using printer’s ink B. injuring the inner skin C. damaging the outer skin D. damaging the colour ( ) 4. Finger-prints have often been used as a method of solving criminal case because it ________. A. is complicated but reliable B. is simple and not expensive C. is expensive but easy to do D. can bring a lot of money