2. 外语
  3. One of the main characteristics of the good language learner is the high ______ in study.

One of the main characteristics of the good language learner is the high ______ in study.

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问题 One of the main characteristics of the good language learner is the high ______ in study.
选项 A、proficiency
B、efficiency
C、sufficiency
D、deficiency
答案B
解析 形近易混词辨析。proficiency意为“熟练，精通”，如：proficiency in English(精通英语)；efficiency意为“效率，功效”，如：Friction lowers the efficiency of a machine．(摩擦降低机器的效率。)sufficiency意为“充足”，如：financial sufficiency(财政充裕)；deficiency意为“缺乏，不足”，如：a nutritional deficiency (营养不良)。根据常识可知，优秀的语言学习者应有较高的学习效率，由此选B)。
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