单选题：If you __________ Jerry Brown until recently, you'd think th

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If you __________ Jerry Brown until recently, you'd think the photograph on the right was strange． A．shouldn't contact
B．didn't contact
C．weren't to contact
D．hadn't contacted

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The information was later admitted __________from unreliable

The information was later admitted __________from unreliable sources．A．that it

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__________ is the center of our planetary system was a diffi

__________ is the center of our planetary system was a difficult concept to gra

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第12题应填

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According to the writer，highly skilled workers．

According to the writer，highly skilled workers． A．completely disappeared with t

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根据以下资料，回答题：Decide which of the choices given below would bes

根据以下资料，回答题：Decide which of the choices given below would best complete the pas

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