Questão 33

[1]  Greenpeace _____ against environmental degradation
since 1971 when a small boat of volunteers and journalists
_____ into the U.S. atomic test zone of Amchitka, Alaska.
Our focus has been on the most crucial worldwide threats
[5] to our planet’s biodiversity and environment. It’s also our
responsibility to expose environmental criminals, and to
challenge governments and corporations when they fail to act
appropriately in order to protect our environment and our
future.
Fonte:www.greenpeace.org

Choose the best verbal form to have the text completed, respectively: