French language Q&A Forum

My quiz has the answer for this as "Vous vous êtes caché dans le placard"  I don't understand why it is cassé and not cassés .  I know agreement for reflexives can be complicated but this doesn't seem to be one of those cases. 

How do you know if a word requires avoir or être in passé composé like for eg finir how do we know if it requires avoir or être when you see the word 

why does "en bon etat" not agree with the feminine house?

In the quick lesson you use the example Ce problème, auquel je ne comprends rien, m'énerve 

Why is it auquel and not duquel ( or de qui) since comprendre is a transitive verb ? What am I missing?

« Elle se maria » [cette année-là] I don’t recognise the conjugation of se marier?

and when do you use    malgre lui

If you are asking someone their nationality, it is obvious that you do not know the person. In which case, wouldn't the question be informal in any situation? 

I did a review test and I answered: "Nous n'attendons plus Laura"

This follows the above example Je n'aime plus Theo

But, may answer was wrong, the correct answer was:
"Nous n'attendons Laura plus"

why?

curious can the verb guarder be used instead of tenor?? for keep?????