To celebrate the New Year, the students stayed in the classroom after school, the performances and the room.
A. practicing ; preparing
B. practiced ; prepared
C. to practise ; prepare
D. practicing ; prepared
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(答案→)A. practicing ; preparing
B. practiced ; prepared
C. to practise ; prepare
D. practicing ; prepared
解析：考查非谓语动词。句意“为了庆祝新年，学生放学后待在教室里，练习节目，布置教室。”the students和practice与prepare是主谓关系，应该用主动形式，表示伴随状况。故选A。