French language Q&A Forum

I don't understand the grammar of parmi lesquels choisir in this sentence. could anyone help to explain? thanks. 

I wanted to ask if you could have the option of listening to this in a beginner speed as it is now, then pick a higher speed after you have gone through the lesson. 

Thank you for this great site. I don’t use it as often as I should. Too many courses on the go, but I’m planning to make better use of this site this year. 

Is the sentence "Il s'est excusé pour n'apporter pas ses lunettes" a correct translation of the sentence above, if not, what is the correct one?

I know that depuis can be used with the passé composé in the negative sentence but can it also be used with the affirmative?

How would you translate a sentence like:

I have seen him once since last week or They have visited their grandmother twice since last week. 

When I translated them into Google and other translation sites they both use the affirmative passé composé with depuis, which I didn't think you were meant to do. 

Hi