Sử dụng which/who/whom/whose 1. A woman answered the phone. She told me you was busy => 2. The bus is always crowded. I take it to school every morning => 3. They are singing a song. I don't know the song => 4. A man spoke to me. He was very helpful => 5. A midwife is a woman. She assists other women in childbirth =>

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