Why are telescopes put on top of mountains or in space

Write a daily or recently experienced situation and describe it in as much detail as you can in french

Can somebody fully explain the “le passé composé régulier et irrégulier avec avoir” thing to me

Choose the best translation of the following sentence. i want to know what you are doing. je veux savoir ce qui tu fais. je veux savoir ce que tu es fais. je veux savoir ce que tu fais. je veux savoir ce qui tu es fais.