Without facts , a person can’t form a correct opinion , for he needs to have ac

 Without facts , a person can’t form a correct opinion , for he needs to have ac

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 Without facts , a person can’t form a correct opinion , for he needs to have actual knowledge _____ his thinking .
A.which to be based on B.on which to base
C.which to be based D.which to base

答案
B
解析
本题可采取增元法。把句子的后半部分补全为:for he needs to have actual knowledge on which he bases his thinking .   base on:建立……基础上。如Parents owe their children a set of solid values around which to build their lives。故选B。
举一反三
 We finally bought several books by Shakespeare, ______ is one.
A.which of themB.which of whoseC.of which thisD.and of them

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You’ll have to wait for one more week, ______ the manager will be back from his trip.
A.beforeB.whenC.asD.until

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They have no idea at all ____.
A.what he is working onB.what is he working on
C.what did he work onD.what he is working

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You will succeed in the end ____ you give up halfway.
A.even ifB.as though
C.as long asD.unless

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“Was his father very strict with him when he was at school?” “Yes. He had never praised him _______ he became one of the top students in his grade.”
A.afterB.unless
C.untilD.when

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