Sử dụng đại từ quan hệ ( Who, Which, That ) để kết hợp các cặp câu, dùng dấu phẩy khi cần thiết.
1. I'm reading a book. I bought it in Sydney in 1996.
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2. Some people dream of a job. They can do the job without technology.
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3. My stereo doesn't work today. It worked yesterday.
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4. The man is a computer expert. You are talking to him.
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Sinh Học lớp 12
