---Hasourgovernmenttakensomemeasurestoovercomethelacko...
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問題詳情:
--- Has our government taken some measures to overcome the lack of electricity?
--- Yes, but it may take some time ________ we have enough power.
A. since B. after C. unless D. before
【回答】
D
知識點:連詞
題型:選擇題
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