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英语语法问题.---Are you sure you_have______lost)your dictionary?--

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英语语法问题.
---Are you sure you_have______lost)your dictionary?
----Yes,I_______(look)for it everywhere,but I still can’t find it.
填什么?为什么?
英语语法问题.---Are you sure you_have______lost)your dictionary?--
have lost,have looked
现在完成时态,表示过去发生的事情对现在的影响.
--Please p______me your dictionary --OK.here you are. ()1.Can l have a look ( ) your new dictionary?-Sure.Here you you are sure( )if you don't try your best 1.Tom asked:"Are you sure your mother will come?" Sure.Here you are.This cake is for your cat. --------- i borrow your MP3? Sure. here you are you are sure=are you sure? 英语翻译Are you sure? ARE YOU SURE{?}THAT? are you sure sure .here you are. Are you sure?