Choose the correct option to fill in the blank.
Some of the people _____ to the party can't come.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → who were invited
This sentence requires a relative clause to describe the people. The people are the recipients of the invitation, meaning the action is done to them (passive voice).
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Who were invited is a relative clause in the Past Simple Passive voice that correctly identifies the people who received the invitation.