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We had trouble finding a pure water supply.
A: typical
B: complete
C: clean
D: clear
B: complete
C: clean
D: clear
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参考解析
解析：题干意为“我们在寻找纯净水供应方面遇到了麻烦。” 句中划线词意为“纯的，干净的”。C项clean意为“清洁的，干净的”；例句：You must keep your clothes clean．你必须保持衣着整洁。A项意为“典型的，代表性的”；菜。B项意为“完全 的，完整的”;D项意为“清楚的，明白的”；故选C。
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