填空题
英语三级B级
2010-09-26
阅读短文，回答题：
What should you do to protect your computer from a virus?
You must make sure that you have an ________________________.
参考答案
暂无
答案解析
本题答案：antivirus program。从原文Be sure to have a good antivirus program and update it regularly可以得到答案。注意题干中将a换成了an，所以在答案中就不能再用good了。