Discuss the problem in groups of four

四个人───Four people;一组───a set

people worldwide are without adequate homes.───人没有足够的住房。

The bus stopped and four people got on.───公共汽车停下来，四个人上了车。

bodies of four people were found riddled with bullets.───4个人的尸体被发现时布满了枪眼。

As I came near, my eyes were open wide, and I felt out of my breath --- He was one of the four people!───当我走近时瞪大了眼睛呼吸急促——他就是那四人之一！

It was capable of safely carrying up to four people and a basket of eggs across a plowed field.───它在穿过犁过的田野时能安全地最多承载四个人和一篮子鸡蛋。

In 1990 three out of every four people still lived and worked, as they always had done, on farms.───在1990年，四分之三的人仍然在农村生活劳作，他们过去一直都是这样。

One in four people worldwide are without adequate homes.

She is one of the four people on my shortlist of great singers.

I can take up to four people in my car.

Thirty four people were slaughtered while queuing up to cast their votes.

Four people had been arrested and committed for trial.