8.Customers are asked to make sure that they ____ the right change before leaving the shop.
The two astronauts said they would never forget the days ____they worked together in the Spaceship and the days ______.they spent together.
Alex asked the policeman_______ he worked to contact him Whenever there was an accident.
I will never forget the day _______ I joined theLeague.
Last week, only two people came to look at the house, ________ wanted to buy it.
The other day I bought a vase, _______ was very reasonable.