如題，今天收到一封信件，內容如下:
Thank you for your application and your time for interview for the admission
to our PhD Programmes 2017-18.
We are pleased to inform that you have been recommended for admission with
financial support. Kindly note that this email
serves as a notification that you are in our nomination list only, and it
does not automatically imply that your admission has been confirmed.
Confirmation of admission offer is subject to verification of admission
documents by the Graduate School of The University of Hong Kong (HKU).
信件最後要求我在3/3前做決定，內容如下:
In this connection, please notify us in advance whether you incline to choose
to study in our School at The University of Hong Kong, or you have already
decided not to, by sending an email by March 3, 2017
(this Friday) you have made such a decision.
因為我還在等一所我最想讀的學校的offer,如果那家沒上我一定會去念HKU,請問
如果我先回覆接受HKU,之後有變動還可以更改意願嗎?
先感謝諸位的回答，如果有不符板規我會自行刪除，謝謝。