Poor health and lack of money may both be road
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Poor health and lack of money may both be roadblocks to educational progress.
A:restraints B:stains C:scarcities D:barriers
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答案：D
健康状况欠佳与经济困难都是教育发展的障碍。restraint“抑制”，例如： He is a man always speaking with restraint．他是个说话拘谨的人。stain“染色、着色”，例如：There’s an ink stain on your shirt．你的衬衫上有一个墨水斑。scarcity“缺少、不足”，例如：The scarcity of fruit was caused by the drought．水果供不应求是由于干旱造成的。barrier"障碍”，最符合题意，例如：Heavy duties on imports and exports are a barrier to international trade．进出口的高关税是国际贸易的障碍。