P1U7 R2 Word Formation

The __________ of bacteria is important for humans because these small organisms play many roles in the global ecosystem. EXIST

We are working under __________ pressure at the moment. EXTREMELY

My biggest __________ this year was to learn to drive and travel to and from the university on my own. CHALLENGING

Too much stress and lack of sleep is a(n) __________ combination. RISK

Any business venture (activity) contains an element of __________. RISK

Some mushrooms contain a deadly __________. POISONOUS

He thinks someone is trying to __________ him. POISONOUS