I am sorry to disapoint you Françoise but I am not the person who posted the message. However, as I said in class, I invited some people from outside to join beeonline and write to you. You do not need to worry - they are all people I trust. So it is Dennis who posted the message and he is asking if you have any questions...so it might be a good idea to ask him some ... this would give him the opportunity to answer them.