We had trouble finding a pure water supply.A typical B complete C clear D clean

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问题 We had trouble finding a pure water supply.

选项 A typical
B complete
C clear
D clean

答案D

解析pure 意为“纯净的”,如:pure gold “纯金”,pure wool “纯羊毛”,pure water “纯净水”,故可用clean来替代。dear是“清楚,清澈”的意思,并非是“清洁的”。
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