Choose the correct answer.

1. Tropical rainforests ... cover about 7% of the Earth's surface are home to many animal and plant species. 2. The plants ... grow in rainforests are used to manufacture 25 % of Western medicines. 3. Peter, ... father is a doctor, joined a conservation group. 4. Ed Stafford is the man ... walked through the rainforest. 5. The man ... fell into the river was saved by the villagers. 6. Frequent rainfall characterises the areas ... tropical rainforests exist.