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[2005.10]The people on the third floor seem ___ a party. You can hear them laughing and shouting.
A.to have
B.to be having
C.to have had
D.being had
正确答案：B
答案解析：本题考查固定词组。seem的用法是seem to do 或seem+从句。seem doing sth 不正确，所以D答案是错误的。根据句意可知这是正在发生的动作，所以B为正确答案。
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