填空题

Dear Sirs,
This is the third month running that your delivery has been late in arriving. Our current order for stationery is already five days overdue.
We have a number of valued customers who are being put to some inconvenience. There seems to be no obvious reason why your normally prompt deliveries should become so unreliable. I would be obliged if you would look into this matter as soon as possible.
Ours is a small, family business in a very parochial (狭小的) area. We depend very much upon the goodwill of our customers. I’m sure you will appreciate the importance of this matter being cleared up at your easiest convenience.
Yours faithfully,
Grayson Brown
1) Mr. Brown writes to complain about (46) of the ordered goods.
2) His order for stationery has already been late for (47) when this letter is being written.
3) Mr. Brown feels it a pity that the (48) deliveries have become so unreliable.
4) According to Mr. Brown, this incident has caused (49) to his customers, upon whose (50) his small family-run business depends.