my pen is lost,have you seen it anywhere 为什么不说my pen has been lost,have you seen it anywhere

My pen is gone.My pen is lost.My pen is gone.My pen is lost. Where is my pen?I_____it A.might lose B.would have lost C.should have lost D.must have lost that is _i lost my pen my pen is lost,have you seen it anywhere 为什么不说my pen has been lost,have you seen it anywhere My pen is lost.这句话对吗?lost 似乎是形容词 Where is my pen?I_____it.（b）A.should have lost B.must have lost C.would have lost D.might lose为什么不是d？ The following ,which is right?A.my pen has lost.B.My pen is lost My pen is in the lost and f______case The pen I ( ) I ( ) is on my desk,right under my nose.A.think;lost B.thought;had lost C.think;had lost D.thought;have lost这道题应先哪个?有哪位朋友能从语法的角度分析一下? The pen I _____ I _____ is on my desk,right under my nose. A.think;lost B.thought;had lost C.think;had lost D.thought;have lost Where is my pen?I _____ it.A.might loseB.would have lostC.should have lostD.must have lost选择原因? my pen has been losing,have you seen it anywhere或my pen has lost,have you seen it anywhere, The pen I ________ I ________ is on my desk,right under my nose.A.think; lost B.thought; had lostC.think; had lost D.thought; have lost为什么D不行啊 --My pen is lost and I can't fond it anywhere .---So you will have to buy ______.A.itB.fewC.any D.one where is my pen? I　＿＿＿　it．A. might lose B. must have lost 选B.但A为什么不可以?也是表推测啊 The pen I ___I___is on my desk.A.thought;have lost B.thought;had lostC.think;had lostD.think;lost i lost my pen.i have to write with a pencil这个句子为什么要把lost改为have lost呢? Where is my keys?I___________it.A.might lose B.would have lost C.should have lost D.must have lost