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After winter comes spring, ________ all living things come to life．

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We finally arrived at a village at the foot of the mountain, ________ we stayed for the night．

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Mr．Smith, ________ came to see us yesterday, is a relation of my wife．

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The hospital now has over 100 staff members, of ________ 70％ are medical personnel．

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________ is known, smoking is harmful to one’s health．

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He lost my bike, ________ made me unhappy．

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She sang a new song, ________ we liked very much．

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Our teacher, ________ wife is a nurse, is very strict with us．

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Yesterday I met Lin Ping, ________ seemed to be very busy．

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Tom won the first prize, ________ everybody knows．