问题
选择题
A student at a Nevada middle school opened fire on campus, wounding two l2-year-old boys and__________ a math teacher.
A．kill
B．killing
C．killed
D．to kill
答案
答案：B
题目分析：句意：一个Nevada的中学的学生在校园开枪，伤了两个12岁的男孩和一名数学老师。这里用现在分词做伴随状语和wounding是并列的，所以选B。