Her father was an artist who sometimes______as a tour guide.

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问题 Her father was an artist who sometimes______as a tour guide.

选项 A、works
B、worked
C、has worked
D、must work

答案B

解析 考查动词时态。主句用的是一般过去时,从句谓语动词也用一般过去时。一般过去时可以表示过去某一段时间内经常或反复发生的动作,常和often,usually,always,sometimes,every day等时间状语连用。句意为“他的父亲过去是位艺术家,有时候也当导游”。故选B。
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