Which word begins the relative clause in this sentence?

Last Friday was the day that Karl won the marathon.

a) that

b) day

c) was

d) Last

Answer: a) that.

Explanation:

A relative clause is a clause that starts with a relative pronoun, and provides more information about the noun that precedes the clause. The most common relative pronouns are who, whom, whose, which, and that (but where is also sometimes used as a relative pronoun).

In the sentence 'Last Friday was the day that Karl won the marathon', there is a noun - day, followed by a relative clause 'that Karl won the marathon', which gives us more details about that particular day.