问题详情

collection, note, notify, unless, if, no alternative but, failure, fail
Dear Sirs,
I am afraid your (1) to settle your account, which is over due for more than six months, will ]cave us with (2) resort to legal proceedings.
This is to (3) you that (4) we receive your check for ＄7550.50 by June 30, we will place your account in the hands of our attorneys for (5) .
Yours sincerely,