健康的饮食必须是一个平衡的食物组，因为没有哪类食物可以提供满足身体健康的所有物质。

健康的饮食必须是一个平衡的食物组，因为没有哪类食物可以提供满足身体健康的所有物质。

A.A GOOD DIET MUST CONCLUDE A BALANCE OF SEVERAL FOOD GROUPS, AS NO SINGLE GROUP CAN PROVIDE EVERYTHING WE NEED FOR GOOD HEALTH.

B.A GOOD DIET MUST INCLUDE A BALANCE OF SEVERAL FOOD GROUPS, AS NO SINGLE GROUP CAN PROVIDE EVERYTHING WE NEED FOR GOOD HEALTH.

C.A GOOD DIET MUST CONTAIN A BALANCE OF SEVERAL FOOD GROUPS, AS NO SINGLE GROUP CAN PROVIDE EVERYTHING WE NEED FOR GOOD HEALTH.

D.A GOOD DIET MUST COVER A BALANCE OF SEVERAL FOOD GROUPS, AS NO SINGLE GROUP CAN PROVIDE EVERYTHING WE NEED FOR GOOD HEALTH.

正确答案是B