
Get yourself to the catacombs! I went to Paris for my birthday in September '05, but the catacombs shut at around 3 or 4pm I think and we missed them by half an hour or so. I was gutted!
Not sure about them not liking to speak English - they seemed happy enough to do it when I was there. Can't recommend any restaurants or the like offhand - we went to 2 (one for lunch and one to satisfy a craving for proper chocolate crepes :-P), but the first one nabbed us as we walked past and we happened to be hungry, and the second one was the first one we found that served said crepes!
Just have a wonder around, get yourself a day pass for the metro (and the cashiers all speak english by the way) and enjoy yourself!
And get up that tower of course!