Clearly and thoughtfully________, the book inspires confidence in students who wish to seek their own answers.

A.writing

B.to write

C.written

D.being written

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答案

C

试题分析：句意： 这本书写得既清楚又完整，该书激励了那些希望寻求自己的答案的学生的自信心。clearly and thoroughly 是副词，writing是动词的-ing形式，表示与主语book是主动关系;to write是动词不定式，表将来和目的;written是动词的过去分词形式，表示与主语book是被动的关系。根据语境可知，选C。