题目内容：

people( ) smoke are going to have troublr breathing an even die some day.选择一个答案
Awhich Bwho ,c those ,d these

优质解答

b.who引导的定语从句来修饰people.人的此如humankind,man,people等要用who引导.句意:吸烟的人将会遭遇呼吸困难,甚至某天死亡.