【单选题】

Dear Madam,

In reference to our telephone conversation this morning, I would like to confirm in writing our reservation for two rooms in your hotel for four nights. We’ll arrive on July 2nd and plan on leaving in the morning on July 6th.
We would be very (38) in attending the town concert on July 3rD、Would you (39) to know if tickets are still available
Your website mentions that guests need to (40) by 11A、m.
Can we arrange to leave our bags at reception and then collect them mid-afternoon before we go out to the airport
We are also considering extending our (41) by one night.
If we decided to do so, would we have to make a formal reservation now
Thank you in advance.
Kind regards,
Kitaru Fukuyama
A、interest
B、interesting
C、interested
D、interestingly