【題目】I never doubt ______ the science museums are worth_______.

A. whether，visiting B. that, to visit

C. whether , a visit D. that ,a visit

【答案】D

【解析】

試題分析：句意:我從不懷疑科學博物館值得參觀。whether 是否；that引導賓語從句時沒有意義；當doubt用于否定句中的時候，賓語從句的引導詞用that；be worth 值得，后跟名詞或動名詞形式。故選D。

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