Read short dialogues and choose the right answers.

1) A: We must stop cutting down trees.
В: ...
2) A: We should recycle more.
B: ...
3) A: I think the government should introduce stricter laws protecting nature.
B: ...
4) A: You mustn’t pick these wild flowers.
B: ...
5) A: Did you know that there are already 700 extinct species of mammals?
В: ...
6) A: Did you know that there aren’t many pandas left in the wild?
B: ...