单选题：Bysaying“Mydogcouldtellthedifferencebetweenbottledandtapwate

题目分类：英语四级
题目类型：单选题
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题目内容：

Bysaying“Mydogcouldtellthedifferencebetweenbottledandtapwater”（Line4Para.2）,vonWiesenbergerwantstoconveythemessagethat________. A．plaintapwateriscertainlyunfitfordrinking
B．bottledwaterisclearlysuperiortotapwater
C．bottledwateroftenappealsmoretodogstaste
D．dogscanusuallydetectafinedifferenceintaste

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答案解析：

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