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Whatareyoumailing,Linda?-----Atextbookanewmethodofteachingphysics.Iwantmyfriendtotakealookatit.A.isbasedonB.basedonC.basingonD.whichbasedupon为什么选B,不是应该是bebasedon

题目详情
What are you mailing,Linda?
-----A textbook_____a new method of teaching physics.I want my friend to take a look at it.
A.is based on B.based on C.basing on D.which based upon
为什么选B,不是应该是be based on
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答案和解析
您好,很高兴为您
What are you mailing, Linda?琳达,你在邮寄什么?
-----A textbook_____a new method of teaching physics. I want my friend to take a look at it.
一本关于物理教学新方法的书(这只是短语,而非一句话),我想让我的朋友看看它.
A.is based on B.based on C.basing on D.which based upon
这里是过去分词短语based on...后置作定语修饰textbook,回答的前一段只是一个短语,对提问中的what做解答,而非完整的句子,如果用A,则变成了一个完整的句子,语法是正确的,但是不符合题意和语境.
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