6．You shall get the book tomorrow afternoon，because I        reading it by then．（　�。�
A．will finishB．have finished
C．finishedD．will have finished

分析 考查將來完成時(shí)態(tài)，句意：明天下午你將得到這本書，因?yàn)榈侥菚r(shí)我將已經(jīng)讀完．

解答 答案：D　根據(jù)語境和時(shí)間狀語by then可知此處使用將來完成時(shí)態(tài)．

點(diǎn)評 by是完成時(shí)態(tài)的標(biāo)志，by后跟過去的時(shí)間，用過去完成時(shí)態(tài)，by now，用現(xiàn)在完成時(shí)態(tài)，by后跟將來時(shí)間，用將來完成時(shí)態(tài)．

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