1. ---Thanks a lot for everything. You have certainly made my stay very pleasant.
---__________.
A. It’s my duty. B. It’s all right. C. It’s my pleasure. D. It’s nice to say so.
22. It came as ________ shock to learn that Bob, one of the top students in our class, failed in _________ exam.
A. /; the B. a; the C. a; an D. /; an
