Although punctual himself, the professor was quite used ________ late for his lecture.

1. A.
   to have students
2. B.
   for students’ being
3. C.
   for students to be
4. D.
   to students’ being

Although punctual himself, the professor was quite used ________ late for his lecture.

A. to have students　B. for students' being　C. for students to be　 D. to students' being

 Although punctual himself, the professor was quite used_____late for his lecture.    A. to have students              B. for students’ being

   C. for students to be             D. to students’ being

Although punctual himself, the professor was quite used _____ late for his lecture. 

A. to have students                     B. for students' being

C. for students to be                    D. to students' being