Viết lại câu sao cho nghĩa không đổi 1. Because he is too old, he can hardly do anything => His age prevents 2. Although Lan didn't feel well, she went to work. => In spite of 3. My sister is a hard student. She always does her homework before going to class. => My sister, who 4. With hard work, he can improve his pronunciation quickly. => If he

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