英语单选题 Our government has taken some measures to o

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英语单选题 Our government has taken some measures to o
英语单选题
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
为什么不能选unless 答案是before 最好用语法解释翻译我觉得unless也说的通啊

D 意思是在我们能源充足之前,要花费很长的时间

英语单选题 Our government has taken some measures to o the government has taken some measures to solve the shortage China has (taken some measures )to control the population 1.The government has taken measures to ____ the high prices 分析list the measures which the local government has taken to the government has (taken a lot of measures) to reduce traff Our government has already taken action to reduce the traffi some measures must be taken to stop the abusing of our farml 英语翻译1、Some measures must be taken to protect our environment The goverment has taken some measures .aming at cutting down 1、our government has taken many messures to deal with water But in fact our government has taken actions to struggle wit