The time has come ___________ we can make extensive use of nuclear energy.A.as B.when C.while D.since

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• 有几道英语试题,帮我看看啊~选择：1.The district grew peas ______ a large scale.A.on B.in C.by D.to2.The time has come ______ we can make extensive use of nuclear energy.A.as B.when C.while D.since3.I distinctly remember ______ you to be home by 10 o’clock.A.telling B.have told C.to tell D.my telling4.In practice,______ to the universities is competitive.A.entrance B.to entering C.to enter D.entry5.In addition,teaching staff is willing ______ extra help if a student n
• The time has come ___________ we can make extensive use of nuclear energy.
• The time has come ___________ we can make extensive use of nuclear energy.A.as B.when C.while D.since
• is energy A heat B water C Air
• It _____ a lot of energy to heat water.A.takesB.spendsC.costsD.buys