According to a recent survey, four million people ______________ (死于与吸烟有关的疾病)each year.
答案: die of diseases linked to smoking
解析:本句意为“由最近调查显示,每年有400万人死于与吸烟有关的疾病”。“死于……”既可以用短语die of也可以用die from,但考生应注意两者用法上的区别。“与……相关”可以选用related to,associated with,linked to。