| #2 (permalink) Wed Aug 16, 2006 10:28 am Expense
The word expenses refers to particular sums of money that you have spent. If you take a journey for your employer, they will possibly pay your travel expenses - what you spent on the taxi/train/bus fare.
Expense in the singular, which is needed in this sentence, refers to the cost in general of paying for postmen to have vans but the amount of money is not known as it is just a considerable cost
English as a Second Language
You can read my ESL story Present Simple
Joined: 27 Sep 2003