but hasn't been given a chance.是什么时态的语句

but it hasn't been proven yet 翻译 Professer James will give us a lecture on the western culture ,but when and where_yet.A.hasn`t cleand B.didn`t clean C.isn`t cleaning D.hasn`t been claened Professor Wang will give us a lectrue on the black hole,but where and when __ yet.A.hasn't been decided B.haven't decided C.isn't being decided D.aren't decided but hasn't been given a chance.是什么时态的语句 ebay上面买手机提示 but the reserve hasn't been met. 52.We ______ the bus for half an hour,but it ______ yetA.have waited,hasn't comeB.have been waiting,has been comeC.have been waited for,doesn't comeD.have been waiting for,hasn't come When it hasn't been your day She ___this book all the week,but she ___reading it yetA.has read;didn't finish B.has been reading ;didn't finish C.has been reading;hasn't finished D.has read;hasn't finished Joe's fine,but he hasn't been able to do m___in the garden because of the weather But he hasn't got ______money. but don't give -My friend ,Tom ,promised to come to see you.-But he( ) .I have been alone.A .doesn`t B won`t C didn`t D hasn`t --Henry promised to come to see you today.--But he ____.I have been alone.A.hasn't B doesn't C didn't D .hadn't my friends are all here but yours ( )come yet._( )seems to have been no need for us to wait forthem.a:haven't ;it b：hasn't;they c：hasn't;we d:haven't;there 1.—waiters?—yes?sorry,I ordered my food half an hour ago but it.A.hasn't arrived B.doesn't arr1.—waiters?—yes?sorry,I ordered my food half an hour ago but it.A.hasn't arrived B.doesn't arrive C.hasn't been arrived D.didn't arrive2.—shall I Jack could have avoided that terrible car accident ,but he_____careful enough.A.is not.B.hasn't been.C.was not.D.hadn't beenD为何不行?感激不尽! hasn't been to 和 hasn't gone to 什么区别 Everything has been finished ,hasnt it .后面的附加疑问句为什么是hasnt it.