TEST 7 - A letter

Read the texts on the following pages. You will find a word or phrase missing in some of the sentences. Below each of the sentences, four answer choices are given. Select the most appropriate answer to complete the text.

432 Earl Street,
April 22nd
Brighton Bank
33 Head Street
Dear Sirs,
                            Re: Replacement Credit Card
I recently received a replacement for my  credit card through the mail. I had already started using this card when I received yet another card. I am now a little confused about which card I should be using, and I was wondering if I should have one of the cards cancelled. Would it be adequate just to  the second card?
Unfortunately, I am housebound, so I am unable to visit the bank in person. I should be most grateful if you could  me on this matter. I look  to your response.
Yours faithfully,
Kylie Anderson