问题
选择题
Since Tom_____ downloaded a virus into his computer, he can not open the file now.
A．readily
B．horribly
C．accidentally
D．irregularly
答案
答案：C
根据句意，只有C项符合题意。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。readily乐意地；horribly可怕地；accidentally无意地，意外地；irregularly无规则地。