Complete the sentences. Use ex. 9 on page 8 as a model. A person who helps is helpful. A person who is never tired is energetic. People who live in Australia are Australians.

A person who helps other people is helpful.
A person who is never tired is energetic.
People who live in Australia are Australians.
People who like to receive guests are hospitable.
Situations, which influence on our life, are unforgettable.