Nobody knows ___________ how many people are to be blamed for the coalmine accident, so the government is trying to find out the whole truth. ( 章节：3 难度：3)_做题室

单项选择题Nobody knows ___________ how many people are to be blamed for the coalmine accident, so the government is trying to find out the whole truth. ( 章节：3 难度：3): A、inwardly; B、before; C、cleverly; D、precisely

正确答案：D
答案解析：
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