Question

Not until recently _______ paid work outside the home.

A．most mothers in Britain took	B．did most mothers in Britain take
C．took most mothers in Britain	D．were most mothers in Britain taken

Answer 1

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。