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the teacher found him___a smart boy.He___all the maths probl

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the teacher found him___a smart boy.He___all the maths problem.
选项:A、to be,worked out B、is,work out C、is,worked out
D、is,solved 麻烦详解
the teacher found him___a smart boy.He___all the maths probl
C found(find)后可以跟形容词、现在分词、过去分词、介词短语、从句,不能跟不定式to;work out (计算出)更适合与maths problem搭配.