单选题1.[2005.10]The people on the third floor seem___a can hear them laughing and shouting. have be having have hadg 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。