Top tips
Remember that a relative clause usually begins with a relative pronoun, e.g. who, where, which, that, when.
That is not always a relative pronoun. It can be a determiner. For example, I like that picture. To see whether it introduces a relative clause, check if it is followed by a verb (e.g. I like the picture that is hanging in the hall).
You will use the same key knowledge to tackle trickier questions and apply it in more complex ways.