Bonsoir quelqu’un peut m’aider svp

Présent Have + participe passé ou Prétérit?

1.Massive wildfires are a threat to nature: they (burn down) 9.4 million acres of forests in the U.S. in 2015. But some insects can be even more damaging! The bark beetle (already/destroy) .46 millions of acres of American forests.

2. Since its first "lights-out" event in 2007, Earth Hour (grow) to engage more than 7,000 cities and towns worldwide.

3. Australia's natural wonder is in danger: 22% of its coral (die) this year and experts say it could be too late for the rest.

4. Experts say the last decade (be) the hottest in history with land and sea temperatures reaching an average 58 degrees Fahrenheit.