Bythetimeyouarrivethisevening,____fortwohours.A.IwillstudyB.IwillhavebeenstudiedC.IhadstudiedD.IwillhavebeenstudyingB和D区别在哪儿啊？

问题：Bythetimeyouarrivethisevening,____fortwohours.A.IwillstudyB.IwillhavebeenstudiedC.IhadstudiedD.IwillhavebeenstudyingB和D区别在哪儿啊？

答案：↓↓↓

黄小芳的回答：

网友采纳　　选D　　“bythetime+将来时间”,用于将来完成时[willhavedone]或将来完成进行时[willhavebeendoing],排除A,C　　又由于B项是表示被动的,错误,故选D