Iwon#39;ttellhertheansweruntilshe___onitfortwohours.A.hadworkedB.hasbeenworkingC.willhaveworkedD.willhavebeenworkingthankyou

问题：Iwon#39;ttellhertheansweruntilshe___onitfortwohours.A.hadworkedB.hasbeenworkingC.willhaveworkedD.willhavebeenworkingthankyou

答案：↓↓↓

谭凤贵的回答：

网友采纳　　B.hasbeenworking　　until引导时间状语从句,用现在表将来,所以没必要用will　　因为句子中有fortwohours,所以用完成时