Moi aussi, J'ai une probleme avec la vitesse. Je n'ai pas du tout entendre "laissera" dans la phrase Ca nous laissera le temps

I listened to the exercise and I could hear it clearly. The speed of talking is actually quite moderate for French standards.

What I found helpful was to listen to the full text while reading along with it in the end. I repeat this until my ears and my eyes agree. It also helps to speak along with the text. Engage all you got. You will see results soon.

Ça nous laissera le temps - Je ne peux pas entendre ça