1- Put the verbs into the correct form: present continuous or present simple.
Marc , a journalist, is interviewing Jennifer, an environmental scientist.
Marc: So tell me, Leila, why is it important to save the rainforests?
Jennifer: There are so many reasons. One reason is that lots of the plants which (1) grow (grow) in the rainforest could be useful in medicine. We (2) (not / know) all the plants, but there are tens of thousands of them. Chemists and doctors (3) (try) to discover their secrets before they are destroyed.
Marc: I see. What other reasons are there?
Jennifer: Well, scientists (4) (believe) that the rainforests (5) (have) an influence on the world’s weather systems and this (6) (help) to slow down global warming. But, unfortunately, these days the forests (7) (disappear) at a terrifying rate and we (8) (not / do) enough to save them.
Marc: What is the main danger of global warming, in your opinion?
Jennifer: The polar regions (9) (consist) of millions of tons of ice. If they (10) (melt), the level of the sea will rise and cause terrible floods. Most scientists (11) (agree) that global temperatures (12) (already / rise). We must do everything we can to prevent global warming, and that includes preserving the rainforests!
Marc: Thank you, Leila, and good luck in your campaign.
Jennifer: Thank you.