All theindicates that he has been deeply involved in the crime.A. evidenceB. factC. factor

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(答案→)A. evidence
B. fact
C. factors
D. cause
解析：
考查名词词义辨析。句意为：所有的迹象表明他已经深陷这次犯罪。evidence迹象；fact事实；factors因素；cause原因。根据句意选A项。