Rewrite the sentences using the passive voice.​

1. The documentary film about caves will be shown on TV tonight.

2. A new cave in China will be explored in April

3. New things about the ocean floor will be learnt by scientists.

4. 2.000 different species have already been discovered in the Amazon

5. Some species haven't been recorded yet.

6. The desserts have not been studied by many people because they're dangerous.