Use a relative pronoun or adverb to combine each pair of sentences below

Use a relative pronoun or adverb to combine each pair of sentences below.
1. We enjoyed the city. We spent our vacation in this city
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2. One of the elephants had only one tusk. We saw these elephants at the zoo
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3. The professor is excellent. I'm taking her course
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4. The man called the police. His wallet was stolen
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5. A man brought in a small girl. Her hand had been cut
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6. The Smiths were given rooms in the hotel. Their house had been destroyed in the explosion
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7. He introduced me to his students. Most of them were from abroad
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8. They gave me four very bad tyres. One of them burst before i had driven four miles
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9. A man answered the phone. He said Tom was out
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10. Phuong Thao is a singer. You like her music best
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