"oh la la" is not a question but an interjection marking surprise. You don't have to answer it, although you may want to ask a question in turn.
J'ai........ans
This French phrase translates to "What is it?" in English. To respond, you should provide a brief explanation or description of the topic in question.
RSVP is a French term / phrase asking you to respond. You don't need to respond is "French".
like this.
It can be either one, depending on your meaning. You would "respond to" a question or comment directed at you. You would "respond for" someone else who cannot respond for themselves.
they were shocked
Oui!
Say "A Bientot"
crayon and respond
"I dont think that is the proper way to respond to that question"
you can also "respond" or "reply" to a question