1 Paragraph 1 mentions one way that non-native species enter a new environment. What are some other ways?
2 Why do you think gray squirrels are regarded as “major pests,” other than what they do to plants and houses?
3 What reason could some people give for trying to save the red squirrel?
4 Why do you think there are no gray squirrels on the Isle of Wight?
Grammar rule The past simple is used to talk about things which started and finished at a specific time in the past. We use the past simple with expressions referring to finished time: yesterday, the week before last, ago, then, when
Example:The accident happened last week.
When I was young there were no computers in the home.
I didn't have any free time yesterday. Did you go to school on Monday?