Ответ:

  1. “I’ll buy an umbrella for Fairy Day!”
  2. “Will it rain, Alvin?” “Yes, I think so.”
  3. “Look, Alvin! It’s a lovely day. It won’t rain!”
  4. “Never mind! I’ll use my umbrella for the sun!”

Ответ: 2 — Will it rain; 3 — won’t rain; 4 — I’ll use.