the great wall is a great place ____.A.visit B.visiting C.to visit选哪个为什么

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• 几道英语选择题,--（ ） I visit Lucy on Sunday,Mom?--Yes,you ( ).A.Must can B.May be C.Need need D.May need--Not only we but also she ( ) been to the Great Wall before.A.has never B.has ever C,have ever D.have everI like writing my original sentences( )the grammer I have learned.A.used B.use C.to use D.using第一个题目选B,为什么?第二个题目选A,为什么不选B,好像也可以?第三个题目选D.我想知道的是这个句子的结构成分,"using the grammer',在句子充当什么成分?答得好有奖励哦.呵呵.
• the great wall is a great place ____.A.visit B.visiting C.to visit选哪个为什么
• The Great Wall is the must-see place _____ almost all tourists would like to visit when they come to China.A.whereB.to whichC.in whichD.which选哪个?为什么?
• The Great Wall is the place_____almost all tourist would like to visit when they come to Beijing.A.why B.which C.when D.where为什么选B不选D,怎样改句子才可以选D
• Did you have fun____the Great Wall.A visiting B to visit该选哪个?或者两个都不对?为什么?
• the great wall is a great place ____.A.visit B.visiting C.to visit选哪个为什么
• Late的反义词是什么?
• 一道高一抽象函数题已知偶函数f(x)对于任意x∈R有f(x+3)=-1/f(x),且当x∈(-3,-2),f(x)=2x,求f(113.5)的值.不知是哪一步没想到,卡住了f(x+3+3)=-1/f(x+3)=-1/[-1/f(x)]=f(x)，即f(x)=f(x+6)，∴周期T=6，后边就没问题了，答案确实是1/5