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题目内容
（兰州大学大学英语（4）课程作业）
Nobody knows _______________ how many people are to be blame for the coal-mine accident, so the government is trying to find out the whole truth about the accident.
A. call out
B. get ahead
C. wake up
D. come to
A. call out
B. get ahead
C. wake up
D. come to
参考答案
