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All the kids had a lot of fun ________ Children’s Day. They sang and danced happily all day. 
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 The teacher is very angry ___________ these students.
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--Who are you _____?-- My mother.
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 The park is a beautiful place _____ a big lake and many trees.
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We can ask the police. He may know the way __________ the TV station.
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We should protect the animals ______danger.
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