Răspuns:
1. The water in the river is dirty, so we cannot see the bottom.
2. The National Gallery is open every day, and entry is free.
3. The Museum of Childhood is for children, but adults like it too.
4. We saw the paintings of many painters in the museum, but we didn't see Mona Lisa.
5. You can take a tour of the Universe in the Planetarium, and you can enjoy the night sky.
6. Audubon Zoo is open from Wednesday through Sunday, but it isn't open on Monday and Tuesday.