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.—This math problem is too difficult. Can you show me _______, Dad?
—Sure.
A.what to work outB.what to work out it
C.how to work it outD.how to work out it
C

试题分析:句意:这个数学难题太难了。爸爸,你能演示给我怎样算出它来吗?疑问词加动词不定式可以做句子的宾语。选择什么疑问词和句所缺少的成分有关,根据句意,该句缺少方式副词,故选C。
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