Professor Liu ______ for 20 years by the end of next summer.A、has taughtB、will

游客2023-09-24 42

问题 Professor Liu ______ for 20 years by the end of next summer.

选项 A、has taught
B、will be teaching
C、has been teaching
D、will have taught

答案 D

解析本题考查将来完成时的用法。本句有两个时间状语。其中—个是表示将来的by the end of next summer，因此需要使用将来时；另一个是表示从过上开始到将来时间段的for 20 years，需要与延续性动词的完成时态连用。综合上述分析可知，本句的谓语动词需要使用将来完成时，故D项为正确答案。

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Professor Liu ______ for 20 years by the end of next summer.A、has taughtB、will

ProfessorLeeissaid______anotherimportantdiscoveryinphysics.A、tomakeB、h

Whentheprofessorcameintotheroom,hefoundhimself(surround)______byman

[originaltext]M:.WouldyonlikeacopyofProfessorSmith’sarticle?W:Thanks

Theteachingbuilding______forthewholesummer.A、willlockupB、willbelocke

Mysister’sprofessorhadher______papermanytimesbeforeallowinghertopre

Fromthefirstparagraphweknowthat______.[br]ProfessorHarryL.Fisherwas

______,theoldprofessorisstilltryingtolearnaforeignlanguage.A、However

ProfessorLiu______for20yearsbytheendofnextsummer.A、hastaughtB、will

It______meofthevillagewherewespentourholidayslastsummer.A、remembersB、

[originaltext]M：DidtheprofessorgiveanassignmentforMonday?W：Nothingtor

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Ifyouwanttogothere,______.A、sowillIB、soIwillC、IwillsoD、sodoIA

A.acrossB.shortC.actualD.tentativelyE.alteredF.quickG.corre

[originaltext]W:Howoftendothebusesrun?M:Everyhalfhouronweekdays,bu

水体自净作用的概念是()A.水污染后可通过水体自身的物理、化学、生物学作用，

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