问题
选择题
The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can __ _ all foods are secure to us, but we are sure that the situation is turning for the better.
A．acknowledge
B．guarantee
C．identity
D．clarify
答案
B
题目分析：句意：三鹿奶粉事件是一个说明食品安全是大问题的明显的象征；没人能担保所有的食品对我们是安全的，但是我们能确定情况正在变好。acknowledge承认；guarantee说明；identity身份；clarify澄清。故选B。
考点: 考查动词的用法。