.People in developed countries are supposed more healthy food before than what they have

问题补充：

.People in developed countries are supposed more healthy food before than what they have today.

A. to be had

B. to have

C. had

D. to have had

答案：

A. to be had

B. to have

C. had

(答案→)D. to have had

解析：考查时态，固定词组be supposed to do sth意思“被期望做什么事情”，句子有个时间状语before，意思“在…以前”，所以用现在完成时，表示动作对现在造成的影响，被期望已经有健康食物，句子意思“以前发展国家的人们被期望有健康的食物而不是今天所有的”，