第13题: [单项选择]The most ______ students do additional reading to supplement the material in the textbook. A. gifted B. sensitive C. proficient D. diligent 参考答案:D 答案解析:[解析] 形容词词义辨析。句中do additional reading说明学生是勤奋。故答案为D。gifted“有天赋的”;sensitive“敏感的”;proficient“熟练的”。