单选题 To read Tolstoy and ______ to nineteenth century Russian literature are two excellent reasons for taking Professor Morrel's Course.

【正确答案】 D
【答案解析】[考点] 动词不定式的被动语态
[解析] introduce是及物动词，应跟宾语，否则需用其被动形式，此处用不定式以便与前面的to read一致。