问题
选择题
Since David ______ downloaded a virus into his computer, he can not open the file now.
A．readily
B．accidentally
C． horribly
D．irregularly
答案
答案：B
考查副词：A. readily乐意地；快捷地；轻而易举地；便利地B. accidentally 偶然地，意外地，C. horribly可怕地D. irregularly不规则地，句意是：因为大卫偶然的把病毒下载到他的电脑上，现在他打不开文件了。选B。