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Not until recently _______ paid work outside the home.
A.most mothers in Britain tookB.did most mothers in Britain take
C.took most mothers in BritainD.were most mothers in Britain taken
B
考查倒装句型。Not until放句首,应该用部分倒装,即把情态动词、助动词和be动词放到主语前。mothers和take是主动关系,故用主动。故选B。
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