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)