【题目】Since Tom ___ downloaded a virus into his computer, he can not open the file now．
A.readilyB.horriblyC.accidentallyD.irregularly
在线课程【答案】C
【解析】
考查副词词义辨析。句意：由于汤姆无意中下载了病毒到电脑中，现在无法打开这个文件。A. readily乐意地；B. horribly可怕地；C. accidentally无意地，意外地；D. irregularly无规则地。根据句意可知，病毒是无意下载的。故选C。