It's best to complete this activity along with the free handout "Relative Clauses Part 1 (Nonrestrictive)" on the Learn English with Lizzy website: https://sites.google.com/view/learn-english-with-lizzy/lessons-and-activities?authuser=0
You can find many other free activities and lessons on the Learn English with Lizzy website: https://sites.google.com/view/learn-english-with-lizzy/home
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