单项选择题A.takeB.doC.keepD.go
单项选择题A.advantageB.profitC.useD.charge
单项选择题A.exceptB.except forC.onlyD.only for
单项选择题A.coveredB.crowdedC.fullD.plenty
单项选择题A.perpetualB.temporaryC.uniformD.temperate