英语：my parents have promised to come to see me before i（）for AfricaA have left B leave C left D wll leave选哪个 为什么

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• 英语：my parents have promised to come to see me before i（）for AfricaA have left B leave C left D wll leave选哪个 为什么
• －－Could　　you　meet　　me　at　　the　　station?－－I’d　　like　　to　,but　　I　＿　Stanghai　　　when　　　you　　return．　　　A　．will　　have　　left　　　　　　B　was　leaving　　　　　C．　will　　leave　　　　D．have　　　left　　．选哪个?　为什么?
• my plane -----at 9o,clock tomorrow morning.will you come to see me off?A will be leave B leaves C will have left D is left答案是B为什么?
• My parents have promised to come to see me before I -----for Africa.A.have left B.leave C .left D.will leave
• 高中英语选择 不仅仅要答案 要解析的 .--what made you change your mind at the last time?--_______--what made you change your mind at the last time?--__________A.because he lied to me B.his lying to meC.He lied to me D.Him lying to me-- Why didn‘t you tell me the truth that day -- I would have,but you ________ for Fuzhou when I went to see youA .would leave B .have left C .had left D.left（第二题我想选A选项 leave 不是瞬间动词没有完成时吗 但是在百度上有类似的题目 答案是C选项的had left ）
• --___you ___ the film before?--Yes.--Where___you ___it?A.Have ;seen;did;seeB.Did ;see;did;watchC.Have ;seen ;have;seenD.Did;see;have;seen正确答案是A,C为什么错?
• my parents are promised to come to see me before i __{leave} for Africa.讲明理由O(∩_∩)O谢谢 my parents are promised to come to see me before i __（填空）{leave} for Africa.题目没有问题