B) Use the words from Ex. 3a to complete the sentences.

1 Doctors need to be calm in an emergency

2 Artists need to be
because
they have to think of new ideas.

3 Cashiers need to be
customers.

4 Firefighters need to be
because they have got a dangerous job

5 Teachers need to be
because
they have to explain things to their
students
Aerobics teachers need to be
because they do exercise every day.

нужно ​