An tham gia đấu cờ và đã đấu 20 ván. Mỗi ván thắng được 10 điểm, mỗi ván thua bị mất 15 điểm. Sau đợt thi An được 50 điểm. Hỏi An đã thắng bao nhiêu ván?

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I. Combine the pairs of sentences, using Relative Pronouns. 1. My friend is working for an import-export company. The company is located in an industrial zone.  _______________________________________________________________ 2. Rich comes from a country. Its history goes back thousands of years.  ________________________________________________________________ 3. Truong gave me some suggestions. Most of them sound helpful.  __________________________________________________________________ 4. I have two sisters. One of them is a fashion designer.  ________________________________________________________________ 5. These people are very enthusiastic. They volunteer to do charity work.  _________________________________________________________________ 6. I’m going to be interviewed for my new job. That makes me nervous.  ________________________________________________________________ 7. Hue is famous with many kinds of festivals. It is admitted as world’s cultural heritage.  __________________________________________________________________ 8. These wild animals are in danger. People are working hard to save them from being extinct.  __________________________________________________________________ 9. Dr. Fields predicted another earthquake. He lectured at Browning Hall last night.  _________________________________________________________________ 10. Max attends a training course to become a pilot. He is very intersted in flying.  _________________________________________________________________ 11. The Great Wall of China can be seen from the moon. It is one of the great wonders in the world.  ________________________________________________________________ 12. We visited Belgrade. It is the capital of Yugoslavia.  ________________________________________________________________