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题目内容
（黑龙江省教育学院口语(专升本)）
(单选题) The room __________ as a laboratory for nearly two years till now.（）(本题3.5分)
A、 is used
B、 was used
C、 has been used
D、 had been used
A、 is used
B、 was used
C、 has been used
D、 had been used
参考答案
