Ответ:

Visitors can see pretty green lakes

1) Who can see pretty green lakes?

2) Can visitors see pretty green lakes?

3) Can visitors see pretty green or blue lakes?

4) What can see visitors?

5) Visitors can see pretty green lakes, can't they?

The minors carried up the salt to the surface.

1) Who carried up the salt to the surface?

2) Did the minors carry up the salt to the surface?

3) Did the minors carry up the salt or the diamonds to the surface?

4) What did the minors carry up to the surface?

5) The minors carried up the salt to the surface, didn't they?