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(2010·山东兰山高考补习学校高三形成性检测) 37. It ______ Sunday; the library was closed.
A. is B. was C. were D. being
B

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(2010·山东兰山高考补习学校高三形成性检测) 37. It ______ Sunday; the library was closed.
A. is B. was C. were D. being
B