Thegovernmenthastakensomemeasurestosolvetheshortageofel...
來源:國語幫 3.36W
問題詳情:
The government has taken some measures to solve the shortage of electricity, but it may be some time________ the situation improves.
A. since B. when C. unless D. before
【回答】
D
知識點:連詞
題型:選擇題