All the teachers and students were ________ the Teachers’ Day and in the meanwhile they ________ Mr Wang on his being named Advanced Teacher．A.celebrated; celebratedB.congratulating; celebratedC.celebrating; congratulatedD.congratulating; congratulated
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C解析第一个句子的意思是“全体师生正在’庆祝’教师节”。第二个句子的意思是“师生们在向王老师’祝贺’”。