The ______________ of this building took 20 years from start to finish. (construct)
Famous __________were held in the Tower. (prison)
Many _____________come to London each year. (visit)
There are a lot of ______________courses to improve your skills. (train)
Before the ____________of the hot air balloon, no human had ever successfully flown into the air. (invent)
The first successful __________was in 1783. (fly)
The ___________of the balloon depends on the wind. (direct)
The _____________and response of the audience can affect how the actor feels and performs. (behave)

1. construction

2. prisoner

3. visitors

4. Training

5. invention

6. flight

7. direction

8. behaviour