French language Q&A Forum

I can’t figure out when to make cent plural when writing dates. I see it is plural in 1900 but not in most other dates. 

I know these lower level dictées are meant to be spoken slowly to suit beginners, but I find that with the over-enunciation, I often hear words that aren't there. Not sure whether this is a good thing or not?

For example:

-J'adore voyager

-C'est mon passe-temps favori

I hear :

-j'adore à voyager

-C'est mon passe au temps favori

I forgot to check the send e-mail box with my question below & had to redo this exercise to get to the Q&A in order to do so to request a response. I certainly hope part of the upgrade will be the ability to check the Q&A, at least after completing the exercise, without having to repeat the exercise every time. 

un pont ancien     .... d'une autre époque ......     n'est- ce pas?

un ancien pont        ... a former bridge ?????    selon mon livre de grammaire