I can’t fine my purse anywhere. you _have lost it while shopping. A. may B. can C. should D.would

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• I can’t fine my purse anywhere. you _have lost it while shopping. A. may B. can C. should D.would
• 英语：情态动词两道高考题1.some people who don't like to talk much are not necessarily shy;they ____ just be quiet people.A.must B.may C.should D.would(选的是B,我想问的是D不是也有“很可能”的意思吗?那为什么不选D）2.-i can't find my purse anywhere. -you _____ have lost it while shopping.A.may B.can C.should D.would(选的是A,还是D的问题）
• I can’t fine my purse anywhere. you _have lost it while shopping. A. may B. can C. should D.would选?
• 有关情态动词表推测的问题例1：Conserding his ability and experience,he ____ better.A.can have doneB.might have done应该选B,老师说没有can have done,因为can表能力时有时态区别,所以只有could have done,但有can't have done,这是can表推测,没有时态区别.（说的对吗?）但这里用might,might不也表推测吗?为什么不能是选A,can表推测?难道can只能做否定推测以及客观推测?还有,关于should的用法,should也可表推测吧,“他应该是最高的孩子”应该是什么?“He may be the tallest boy.”should can行吗?并请给出解释.例2.-I can't find my purse.-You ___ have lost it while shopping.A.may B.can C.should其他两个为什么不行呢?
• l can not find my purse anywhere ------you______have lost it while shopping.
• Fibonacci数列的递推公式为:Fn=Fn-1+Fn-2,其中F1=F2=1.当n比较大时,Fn也非常