When selecting quotations you should never change the meaning of the quotation by changing the context.
Answer:
opening and cavern
Explanation:
Both have meanings similar to grotto
Declarative sentence. You are declaring them to look at the water.
1. No running in halls so nobody falls or gets hurt
2. No interrupting the teacher while she talks so people can listen and learn in class
3. Don’t wear too exposing clothes where other can see your body