1.Tom's bike is broken. Can you help he?
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2.There aren't some children in the river.
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3.Look! The boy swimming in the lake.
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4.There are 150 millions people in the city.
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5.Learning English are a lot of fun.
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A. me
B. his
C. your
D. her

A. my; mine        
B. mine, his  
C. my; his          
D. her; hers