III/ Combine each pair of sentences, using a relative clause.
1. I have a friend. Her mum is a volunteer worker. ………………………………………………………………………………………………………
2. The old man is my grandfather. He lives next door. ………………………………………………………………………………………………………
3. The storm started at 2 o’clock this morning. It caused a lot of damage.
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Sinh Học lớp 12
