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
考查倒裝句型。Not until放句首，應(yīng)該用部分倒裝，即把情態(tài)動詞、助動詞和be動詞放到主語前。mothers和take是主動關(guān)系，故用主動。故選B。
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