1. What time do I need to arrive. (Capitalize the I)
2. She remembered the rule: Always call home if you will be late. (Capitalize the A in Always)
3. You were great! (Capitalize the Y in You)
4. Sign on the dotted line. (Capitalize the S in Sign)
5. No! I don’t want to stay. (Capitalize the N in No and the I)
11. The coach said, “Run ten laps and then take a break.” (Capitalize the T in The and the R in Run)
12. “Ask what you can do for your country!” Exclaimed President John F. Kennedy. (Capitalize the A in Ask and the E in Exclaimed)
13. My mother cautioned, “I don’t answer too quickly.” (Capitalize the M in My and the D in Don’t)
14. “If I had wanted to go to the party,” Christina said, “I would have asked for a ride.” (Capitalize the I in If and the I in the second statement.)
15. “Please talk quietly,” the librarian requested. (Capitalize the P in Please)
I believe this should be right. Sorry if I made any minor mistakes!