He looked quite healthy though he was .A. in seventyB. in his seventiesC. at seventiesD.

问题补充：

He looked quite healthy though he was .

A. in seventy

B. in his seventies

C. at seventies

D. age of seventy

答案：

A. in seventy

(答案→)B. in his seventies

C. at seventies

D. age of seventy

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