It is hard not to get the message.The virtues of physical fitness are shown on magazine covers,postage stamps,and television ads for everything from beauty soaps to travel books.Exercise as a part of daily life did not catch on until the late 1960s w

It is hard not to get the message.The virtues of physical fitness are shown on magazine covers,postage stamps,and television ads for everything from beauty soaps to travel books.Exercise as a part of daily life did not catch on until the late 1960s w
It is hard not to get the message.The virtues of physical fitness are shown on magazine covers,postage stamps,and television ads for everything from beauty soaps to travel books.Exercise as a part of daily life did not catch on until the late 1960s when research by military doctors began to show the health benefits of doing regular physical exercises.（Growing publicity (宣传) for races held in American cities helped fuel a strong interest in the ancient sport of running.）
Although running has leveled off in recent years as Americans have discovered equally rewarding-and sometimes safer-forms of exercise,such as walking and swimming,running remains the most popular form of exercise.
根据上文回答：
A growing interest in sports developed after （ ）.
A) research showed their health benefits
D) an increasing number of races were held in American cities
我想知道D怎么不对

It is hard not to get the message.The virtues of physical fitness are shown on magazine covers,postage stamps,and television ads for everything from beauty soaps to travel books.Exercise as a part of daily life did not catch on until the late 1960s w
同学,其实你可以发现,很多问题不是因为你不会,而是因为做题时或者考试时你疏忽了,以下几点可以说明这些.本人愚见希望可以帮到你.
1）
running 只是 sports的一种,问题是与sports有关,如果选d就是以偏概全.
2）
Exercise as a part of daily life did not catch on until the late 1960s when research by military doctors began to show the health benefits of doing regular physical exercises.
意思为
运动作为生活的一部分,直到十九世纪七十年代当军医们的研究证明有规律的体育运动有利益身体健康时,才引起了人们的注意.
3）
实际上exercise和sports意思相近 ,你可能疏忽了,都是运动的意思.
4）括号里的内容永远是起补充作用的,一般用意是举例,或者说明.你犯了常识性的错误啊.

就你目前给的信息，Growing publicity (宣传) for races held in American cities helped fuel a strong interest in the ancient sport of running. 是你选D的依据吧？但这句话表达的是对传统的跑步这个运动项目的兴趣增加了。题目问的是对体育运动的兴趣大增的原因，不是具体运动项目的。...

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就你目前给的信息，Growing publicity (宣传) for races held in American cities helped fuel a strong interest in the ancient sport of running. 是你选D的依据吧？但这句话表达的是对传统的跑步这个运动项目的兴趣增加了。题目问的是对体育运动的兴趣大增的原因，不是具体运动项目的。

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