eggplant looks like Blossom End Rot (click the link for more info) Don't know about the others, but some of it could be sunburn(?)
Could be stress due to inconsistent watering or weather, which you can't do anything about, or a possible lack of a certain mineral. Wish I could be more helpful.
Thanks for the help!Though can't get what I want but very appreciate.Is there any forum that I can post my question?
TotalFrance.com is an excellent and very active website here in France, mostly Brits. Here's the garden forum....http://www.totalfrance.com/france/forum/viewforum.php?f=44&sid=1742e79eb83955bf226d580310047aac