Question

【题目】Susan's mother looks so young. It's hard to imagine she's already in her ______.
A.sixty
B.sixties
C.sixtieth

Answer 1

【答案】B
【解析】句意：苏珊的妈妈看起来那么年轻。能以想像她已经六十多数了。在某人的几十岁：in one's+整十的复数形式。故选B。