French language Q&A Forum

I just did a quiz that says “Ils partent leur travail à 19h“ is wrong & “Ils quittent leur travail à 19h” is the correct answer. Can someone please explain why this is so? I can’t see why “partent” is wrong given what the lesson content says. 

Question: Vous _______ le bus arrive.

My answer: Vous attendez le bus arrive.

I just don't understand why it's wrong.

The correct answer is:

Vous attendez que le bus arrive.

Then you put 2 examples that do NOT use the conditionnelle.  I am now totally confused.

Then you use juste sometimes and not others with no explanation.

Please explain full.