Complete the sentences with the words below.

Write one word in each gap.

leaf, system, ambulance, unpredictable, conscious

Where's your smartphone? Tim is sick, I need to call an [ ].

When the woman was found under the ruined building, she was hurt but [ ].

I'm shaking like a [ ] after a really awful nightmare. What should I do to calm down?

The snake's behaviour is [ ], it can attack you at any moment.

Sarah's nervous [ ] is strong enough, she doesn't feel too stressed even under pressure.