Your exam technique
Answer the prompt → choose a reason → explain how it works → illustrate it.
Answer the actual question
When a prompt asks whether you agree, make your position clear. Choose a reason you can explain. Ask how or why it supports your opinion, then give a plausible example. You can use your own experience; you do not need invented statistics or expert quotations.
Connect the ideas
Use because to give a reason and for example to introduce an illustration. Read your paragraph aloud to check that each sentence adds something. This eighty-word drill builds towards Task 2; a full task requires at least 250 words, with about forty minutes recommended.
Avoid this common mistake
Repeating that an idea is important does not explain it. Ask how or why your reason supports your position, and add a concrete example that answers that question.
See it in practice
Starting point
Libraries are good. Libraries are important. Libraries are very good.
Using this skill
Libraries should stay open in the evening because many people work during the day. For example, an evening study room lets a shop assistant learn after a shift.
The example explains how evening opening helps a particular person, instead of repeating the opinion.