a fifteen -minute walk =fifteen minutes' walk a fifteen -minute walk = a fifteen minutes' walk 这两个 哪个对 要a 吗

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a fifteen -minute walk =fifteen minutes' walk
a fifteen -minute walk = a fifteen minutes' walk 这两个 哪个对 要a 吗

a fifteen -minute walk =fifteen minutes' walk

a fifteen -minute walk = a fifteen minutes' walk
a修饰walk,与fifteen minutes无关。

严格来讲第二个对。词的主干是"a walk" ,fifteen minutes' walk 修饰walk。