My father retired in 2008, _____ he has been devoting his time to gardening.A．at_刷题宝

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My father retired in 2008, _____ he has been devoting his time to gardening.

A．at which	B．since when
C．when	D．after that

上一题下一题 0.4难度单项选择更新时间:2017-02-07 04:38:02

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