i have finished a day's work为什么不可以用 a day-work

请问这句应该是have finished还是finished?The moment I （have） finished I’ll give you a call. Have you finished your homework Yes,I __it in twenty minutes.选 A.have finished 还是 B.finished 为什么? I have a ( ) finished my work如题,填空. ( ) you( ) your homework?yes,I finished it an hour ago.A did finish B have finished C.had finished I have just finished it Have you finished this work___?Yes,I have.I've finished it.Have you finished this work___?Yes,I have.I've finished it.A.yet,ever B.already,never C.yet,just D.either,just I ____ the DVD you lent me,but look,I have so many papers to write.A.can have finished B.must have finished C.could have finished D.should have finished 32、I have finished my homework,Mom.May I st32、I have finished my homework,Mom.May I stop ________ (have) a rest? Have you finished you composition already?yes,I ()it in twenty minutesHave you finished you composition already?Yes,I ( ) it in twenty minutes.A have finished B finished C will finish D had finished 请说明一下原因 i have finished可否省略have Have you finished your homework?Yes,i(_)it just now.A（FINISH）B（HAVE FINISHED）C（FINISHED）D（WILLFINISH） ( )-----______ you _______ your homework yet?- ----Yes,I _______ it a moment ago.A.Did;do;finished B.Have;done;have finished C.have;done;finished D.Will;do;finished I（）my homework at seven o`clockI （）my homework at seven o`clock A finished B have finished Have you ______ my knife?A.finished upB.finished offC.finished inD.finished with I( )playing tennis when Tom and George arrived括号内该填A.had finished B.have finished C.finish D.finished哪个呢?不管怎样， He told me he would ____ by the time I got back.A.finish B.has finished C.had finished D.have finished I have finished the essay at last. I have finished my homework.反义疑问句