3. Answer Ralph's letter of invitation in the while-reading section with a thank-you letter. Accept or decline the invitation as you wish. Follow these tips:

Check the layout of the letter: Remember to write the date on top!
Start with an appropriate first sentence.
Make 2-3 paragraphs.
Remember to use an appropriate last sentence to finish your letter. This is your first draft.
Read this first draft and try to include attitude words/phrases. Always review your spelling.
Show/Send it to your teacher/tutor for suggestions/corrections.