He looked quite healthy though he was .A.in seventyB.in his seventiesC.at seventiesD.at the age of s

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【题目】He looked quite healthy though he was .

A.in seventyB.in his seventiesC.at seventiesD.at the age of seventy

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【答案】B

【解析】

考查数词的用法。句意：虽然他已经七十多岁了，他看上去很健康。在某人多少多岁时，是在数词复数前加形容词性的物主代词，即：in one’s seventies。故选B。