We can save our earth_____more trees.A.to plant B.by plantin

We can save our earth_____more trees.A.to plant B.by plantin If we want to make our city() ,we must plant more trees.A.is We can save money ________snacks.A.not to buy B.by not buy C We should plant more trees to make our city more b( ) We are going to plant a trees in our school的问句 we must plant more trees to ____ our planet greener. we can save water by not brushing our teeth under a running we should do as much as we can ___ water.A to save B save 哪个 We can save money by ____expensive things A.buy not B.not bu We plant more trees to make our earth more beautiful.to make We plant trees to protect our environment(保持原句意思) We plant trees every year to protect our environment 改成被动语态