Question

Complete com as formas adequadas do verbo to be, no
presente e/ou no passado.
1. Global warming_____
the most urgent problem
facing human civilization today.
2. Many tropical plants_____
in danger because of
deforestation
3. Winston Churchill____
prime minister of Great
Britain during the Second World War.
4. It_____
a tiring flight, but we_____
now
spending four days in the Amazon!
5. Gases from cars, trucks and buses_____ a big
source of pollution​

Answer 1

Resposta:

1- is

2- are

3- was

4- was/ are

5- are

Explicação: