4. Complete the text using the correct tense forms.
The official language of Australia ___________(to be) English. But Australians_______
(to use) many words which tourists ___________(not to understand).
When the first settlers from Great Britain ___________(to arrive) in the
country they ____________(to see) many unusual things: plants, animals.
They (_____________to make) many new words to describe the world
around them.