the people must do everything they can－－ -waste water from running into rivers

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• ①Who jumps highest in your class?—john ____.A.has done B.did C.does D.do我认为是选B 可答案是选C、 可跳高不已经是过去式了吗?②Today the forests have almost gone.People must____down too many tress .A.stop on cutB.stop from cuttingC.be stop to cut D.be stop from cuttingC③We must do everything we can ____ waste water from running intorivers.A.keep B.kept C.to keep D.keeping can 不是情态动词吗?后面难道不是接原型吗?④ She counldn't __ her words ___by the students.A.get understand B.get understood C
• 求助:两道英语题,帮我选一下正确答案,顺便告诉我为什么好吗?谢谢啦!1.We must do everything we can______waste water from running into rivers.A.keep B.keeping C.to keep 2.How will you spend May Day holiday?We have had a family meeting to talk about it for a long time.At last,we decided___________the kingdom of Thailand.A.to travel to B.to travel C.to visit to
• we must do everything we can （ ） waste water from running into the rivers.A.keep B.kept C.to keep D.keeping要说明理由，
• everybody must do everything he can——waste water from running into rivers.A.keep B.kept C.to keep D.keeping（为什么）2.It ____be him.为什么是can't不是mustn't3.since june 1st last year,all the supermarkets have___free plastic bags.为什么是stopped providing而不是to stop providing
• everybody must do everything he can——waste water from running into rivers.
• the people must do everything they can－－ -waste water from running into riversA keep B kept C to keep D keeping怎么回答,
• the people must do everything they can－－ -waste water from running into rivers
• we must do everything we can （ ） waste water from running into the rivers.
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