By the time you arrive this evening,____ for two hours.
A.IwillstudyB.IwillhavebeenstudiedC.IhadstudiedD.Iwillhavebeenstudying选择哪个答案啊？为什么？B和D...
A.I will study B.I will have been studied C.I had studied D.I will have been studying 选择哪个答案啊？为什么？ B和D区别在哪儿啊？
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选D
“by
the
time
+将来时间”，用于将来完成时[will
have
done]或将来完成进行时[will
have
been
doing],排除A,C
又由于B项是表示被动的，错误，故选D
“by
the
time
+将来时间”，用于将来完成时[will
have
done]或将来完成进行时[will
have
been
doing],排除A,C
又由于B项是表示被动的，错误，故选D
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