"Yes,I____it ten minutes ago." a.have b.had c.mended d.have mended为什么

Yes,I____it ten minutes ago. a.have b.had c.mended d.have mended为什么 Have you found the book?Yes,I____it five minutes_____.A.have found；before B.found ；ago谁知道告诉下! ---Have you done your homework,Bob?---Yes,I____it twenty minutes ago.A.have done B.didC.had done D.do正确答案是B,为什么A不行? Have you found your lost pen?Yes.I____it under the chair just now.A.found B.will find C.have found请说明原因 ----___you___your homework?----Yes.I____it an hour ago.A.Did,finish;have finishedB.Did,finish;finishedC.Have,finished;finishedD.Have,finished;have finished原因、、、 Do you bring the picture?---Yes,I____it for a whole morning.A.looked for B.have looked for 为什么选A不选B? ____you____your book yet?Yes,I____it an hour ago.A.Did...find,foundB.Have...found,foundC.Did...find,have foundD.Have...found,have found原因、、 Do you bring the picture?---Yes,I____it for a whole morning.A looked forB have looked for C have been looking forD had looked for为什么这道题不选BC? ______you_____the interesting novel before?Yes,I____it last month.A Have ; seen ; have seen B Have ;seen; sawC Did;see;have seen D Did;see;saw ( )she ( ) (study) english since she was ten,yes,she has arm is bleeding -yes,i____it with a knife (have hurt ,had hurt,just hurt )括号里面选哪个啊,顺便说说理由啊,我感觉好像三个都能选到的, buses LEAVE THERE 20 MIN BEFORE AND every HOUR FROM 6 TO TEN Could you swim when you were ten?No,I can't./Yes,I can./Yes,I could.哪个对为什么 问一个英语词汇题目-Has the train _____(arrive) yet?-Yes,it arrived ten minutes ago. has jim come _____?yes,he has ____been here for ten minutes. Have you taken the medicine?Yes,I ___(take)it at ten this morning. Has the train___(arrive)yet?------Yes ,it______(arrive)ten minutes ago. _Will there be fewer students in ten years?-yes,_______ ______