2. 外语
  3. Bill is an example of a severely disabled person who has become______at many survival skills.

Bill is an example of a severely disabled person who has become______at many survival skills.

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问题 Bill is an example of a severely disabled person who has become______at many survival skills.
选项 A、proficient
B、persistent
C、consistent
D、sufficient
答案A
解析 固定搭配。proficient意为“精通，熟练”，可后接介词at，表示在“某方面精通”。故答案为A。persistent“不屈不挠的，执拗的”，只能与介词in搭配；consistent“始终如一的，一致的”；sufficient“充分的，足够的”。
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