题目
4 We underline(have to) notice the presence of other cultures when they come into contact with our own.（cannot help but.
4 We $\underline{have to}$ notice the presence of other cultures when they come into contact with our own.
（cannot help but.
题目解答
答案
原句“We have to notice...”需替换“have to”以符合要求。“Cannot help but”可表“不得不”，将句子改为：“We cannot help but notice the presence of other cultures when they come into contact with our own.” 其他选项均不符句意。
答案：cannot help but