Ielts writing Task 2: ways to prepare

Do you agree or disagree?

The student who sent me this question wrote about the advantages and disadvantages of unpaid work for teenagers, but completely forgot to mention the benefits and/or drawbacks for society as a whole.

If you don't fully answer the question, it's extremely difficult to get a band 7.

IELTS Writing Task 2: introduction without opinion

My normal advice for task 2 introductions is this: write two sentences - one to introduce the essay topic, and one to give a basic answer to the question. But what should you put in the second sentence (basic answer) if the question doesn't ask for your opinion?