To read Tolstoy and ____ to the nineteenth century Russian literature are two excellent reasons for taking Professor Morrel’s course.

A、to introduce B、introduce    C、being introduced D、to be introduced

To read Tolstoy and ____ to the nineteenth century Russian literature are two excellent reasons for taking Professor Morrel’s course.

     A. to introduce         B. introduce

     C. being introduced   D. to be introduced

To read Tolstoy and ____ to the nineteenth century Russian literature are two excellent reasons for taking Professor Morrel’s course.

A、to introduce       B、introduce   C、being introduced        D、to be introduced

To read Tolstoy and ____ to the nineteenth century Russian literature are two excellent reasons for taking Professor Morrel’s course.

A、to introduce　 B、introduce C、being introduced D、to be introduced