Ourgovernmenthastakensomemeasurestoovercomethelackofelectricity,butitmaytakesometimewehaveenoughpower.()A.sinceB.afterC.unlessD.before
Our government has taken some measures to overcome the lack of electricity,but it may take some time _______ we have enough power.( )
A. since
B. after
C. unless
D. before
句型搭配,it is+时间段+before从句,表示多久以后…才…;since自从,after之后,unless除非;句意表达的是多久以后才.故选D.
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