Ex8. Use relative adverb to combine each pair of sentences below
1. This is the house. We often stay in this house in summer.
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2. I’ll show you the second hand bookshop. You can find valuable books in this shop.
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3. I have not decided the day. I’ll go to London on that day.
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4. He was born on the day. His father was away on that day.
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5. The book is a telephone directory. We can look up telephone numbers in this book.
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