单选题
It is Sunday today.
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is a fine day. The sky is
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. Mr. Green is
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his family. The family are having an outing. Tom is Mr. and Mrs. Green"s son. Mary is
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. They are
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along a small river. There are some boats
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the river. Mr. and Mrs. Green are looking at
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. Mary is not looking at the boats. She is looking at some ducks. The ducks are swimming
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the river. What is Tom
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? He is in the river now. He is
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. Mr. Green and his family are very happy today!