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【单选题】
She ______ working till he was sy (七十) years old.
A.
kept on
B.
kept up
C.
followed
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题目标签：七十
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】She ______ working till he was seventy (七十) years old.
A.
kept on
B.
kept up
C.
followed