Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 23.

My first job was a sales assistant at a large department store. I wanted to work part-time, because I was still studying at university and I was only able to work a few nights a week.

 I came across the advertisement in the local newspaper. I remember the interview as though it were yesterday. The (19) ________ manager sat behind a large desk. He asked me various questions which surprised me because all I wanted was to work in sales. An hours later, I was told that I had got the job and was given a contract to go over. I was to be trained for ten days before I took my post. Also, as a member of staff, I was (20) ______ to some benefits, including discounts.

 When I eventually started, I was responsible (21) _______ the toy section. I really enjoyed it there and I loved demonstrating the different toys. I was surprised at how friendly my colleagues were, too. They made working there fun even when we had to deal with customers (22) ______ got on our nerves. (23) _______, working there was a great experience which I will never forget.
Question 21:

A. for

B. with

C. in

D. to