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21. The policeman stopped him when he was driving home and _____ him of speeding. A. charged B. accused C. blamed D. deprived B. accused. accuse sb. of... 控告某人犯有......, warn sb. of警告、告戒某人有......deprive sb. of sth.剥夺某人某事。charge sb. with murder 。 22. Mr. Smith gradually _____ a knowledge of the subject. A. attained B. achieved C. required D. acquired D. acquired. acquired 获得; 得到：He has acquired a good command of English language. achieve, vt. 取得 , 实现 。 attain, vt. 达到 , 取得 ：1) I hope you will attain your object. 2) He attained success through hard work. 23. This is the _____ piano on which the composer created some of his greatest works. A. actual B. genuine C. real D. original A. actual 本题中actual 实际使用过的。actual, read, genuine是同义词, 有时可以互换, 如：an actual event in history, , real banknotes , 其反义词是false ; original , 其反义词是duplicate 。从不同的角度看, 似乎任何一个选择都说得过去, 但按照题意选A. actual 最佳, 因为题中强调的不是钢琴的真假, 而是指作曲家实际使用过的。本题译文：这是作曲家创作他的一些杰出作品时实际使用过的那台钢琴。 24. My camera can be _____ to take pictures in cloudy or sunny conditions. | 
