2. 外语
  3. Poor health and lack of money may both be ______to educational progress.

Poor health and lack of money may both be ______to educational progress.

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问题 Poor health and lack of money may both be ______to educational progress.
选项 A、restraints
B、stains
C、scarcities
D、barriers
答案D
解析 名词辨析 四选项的意思分别为：A) restraints "束缚，约束”，常与of连用，restraint of trades；B) stains“污点”；C) scarcity "稀少”；D)barriers "障碍”，barrier to为固定搭配，根据句子的前因后果，只能填入barriers 一词。
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大学英语四级

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