French language Q&A Forum

In my A0 entry test, there was a question to see if "un canapé rectangulaire" is correct or not. The answer was not but I wonder why? 

An example  is : Vous avez abattu la victime de sang froid with the translation : You shot down the victim in cold blood. Does abattre imply shooting, or would attacked,assaulted,slaughtered or killed be correct ?  

When this command is negated, it becomes "Ne vous dépêchez pas ! (or ne te dépêche pas). I could not understand the rationale for this structure by reading the current lesson.  I am guessing the reason may be because, nous, vous,  and te are pronouns and so surrounded together with the verb by ne and negative word. Clarification would be greatly appreciated.

Similar question in the quiz (instead a female buying coffee), but when I chose the "some" option (she buys some coffee), I was not granted the score. That's contradictory and confusing. Which is it? With the "some", or without?

Can puis be used instead of ensuite. As this was not presented as a correct alternative.

mais 'puis' je me suis réveillé, et ce n'était qu'un rêve !