Có 19 người xuống tàu ở trạm đầu tiên. 17 người khác lên tàu. Giờ tổng cộng trên tàu có 63 người. Như vậy, lúc đầu trên tàu có bao nhiêu người?

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Ex3: Mark letter A, B, C or D to combine these pairs of sentences that is closest in meaning to the original sentences. 1. The first boy has just moved. He knows the truth. A. The first boy who knows the truth has just moved. B. The first boy whom knows the truth has just moved. C. The first boy who has just moved knows the truth. D. The first boy who know the truth has just moved. 2. I don’t remember the man. You said you met him at the canteen last week. A. I don't remember the man whom you said you met him at the canteen last week. B. I don't remember the man whom you said you met at the canteen last week. C. I don't remember the man who you said you met at the canteen last week. D. I don't remember the man whom you said you meet at the canteen last week.3. That is the student. I borrowed his book last week. A. That is the student I borrowed whose book last week. C. That is the student, whose book I borrowed last week B. The student whose book I borrowed that is. D. That is the student whose book I borrowed last week 4. The most beautiful girl lives in this city. I like her long hair very much. A. The most beautiful girl, whose long hair I like very much, lives in this city. B. The most beautiful girl, whose lives in this city, long hair I like very much, C. The most beautiful girl, whose hair long I like very much, lives in this city D. The most beautiful girl, whose long hair I like very much, lived in this city 5. The man is my uncle. We met him at the bar yesterday. A. The man whom we met him at the bar yesterday is my uncle. B. The man who we met at the bar yesterday was my uncle. C. The man whom we met at the bar yesterday is my uncle. D. The man whom is my uncle we met at the bar yesterday. 6. The tree has lovely flowers. The tree stands near the gate of my house. A. The tree who stands near the gate of my house has lovely flowers. B. The tree which has lovely flowers stands near the gate of my house. C. The tree which the tree stands near the gate of my house has lovely flowers. D. The tree which stands near the gate of my house has lovely flowers. 7. The book was the detective story. I liked it very much. A. The book which I liked it very much was the detective story. B. The book which I liked very much is the detective story. C. The book which I liked very much was the detective story. D. The book which was the detective story I liked it very much. 8. The girl used to be a Miss World. We are talking about her. A. The girl whom we are talking about her used to be a Miss World. B. The girl whom used to be a Miss World we are talking about. C. The girl who used to be a Miss World said that she knew you. D. The girl whom we are talking about used to be a Miss World. 9. He told her about the book. He liked it best. A. He told her about the book which he liked it best. B. He told her about the book which he liked best. C. He told her about the book whom he liked best. D. He told her about the book whose he liked best. 10. The old man is working in this factory. I borrowed his bicycle yesterday. A. The old man is working in this factory which I borrowed his bicycle yesterday. B. The old man whom is working in this factory I borrowed his bicycle yesterday. C. The old man whom I borrowed his bicycle yesterday is working in this factory. D. The old man whose bicycle I borrowed yesterday is working in this factory