What puzzles me is why his books are so po
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What puzzles me is why his books are so popular.
A:shocks B: influences C: confuses D: concerns
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答案：C
题干意为“使我疑惑的是，为什么他的书如此受欢迎。”句中划线词为动词，意为使人迷惑。C项confuses意为使困惑；例句：Don’t confuse lib-erty with license．不要把自由与放纵混为一谈。A项意为使人震惊；B项意为影响；D项意为关系到；关心；故选C.