This is an example of a question, and how to answer it. The text in black is the exam question, the text in green is what you should be writing (or thinking!). The example essay is in blue.
You are going away for a few days, and your friend will visit your house to feed your pet. Write a note of about 150 words.
A. thanking your friend for helping
B. saying where you have left the food
C. what to do if there are any problems
Quick check - will this be formal or informal? Do I understand all the information in the bullet points?