reaction

https://tts.langeek.co/read?text=cmVhY3Rpb24&hash=e225f947d5b9563ed459ac955f391e4ee4be9722&lang=en&cache-only=0&driver=googletts

Here you will find the vocabulary from Unit 7 - 7C in the Insight Intermediate coursebook, such as "vibrate", "conclude", "situate", etc.