On Mar 14, 2010, at 9:07 PM, [email protected] wrote: > A good mark must be durable in itself and not easy to remove either accidentally or wilfully.
Why do you say that?
On Mar 14, 2010, at 9:07 PM, [email protected] wrote: > A good mark must be durable in itself and not easy to remove either accidentally or wilfully.
Why do you say that?