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One of his eyes was injured in an accident, but after a ______ operation, he quickly recovered his sight. A) precise B) considerate C) delicate D) sensitive 注：1. delicate 精致的 2. precise 精确的 3. considerate 体贴的，体谅的 considerable 相当多的，大量的 4. sensitive 敏感的 sensitive to sentimental 多愁善感的 resent 愤恨 As an excellent shooter, Peter practised aiming at both _______ targets and moving targets. A) stationary B) standing C) stable D) still 注：1. stationary 静止的，固定的 2. standing 永恒的;延续的 3. stable 稳定的 4. still 静止的;静寂的 In American universities, classes are often arranged in more flexible _______ and many jobs on campus are reserved for students. A) scales B) ranks C) grades D) patterns 注：1. scale 等级，刻度，天平 2. rank 排名 3. grade 年级;品味 degrade 降级 | 
