①Have you ever paid for educational podcasts（播客） or live videos?Ask some people and most of them will say yes. "Pay-for-knowledge"has been fashionable these years.Everything you think of can be found online,skills of talking,designing,computer programming and so on.
②Why is the"pay-for-knowledge"industry developing so rapidly?First,its development is based on the Internet.With a fast network and a smart phone,anyone who has passed the identity（身份） check can be an online teacher,and anyone with an online account can buy "pay-for-knowledge"products.Second,people are afraid to miss any information.They hope for more useful information which is usually at the hands of experts.Moreover,the need to learn new skills in today\’s job market also pushes people to learn on such educational podcasts.
③The industry of"pay-for-knowledge"has proved（证明）to be a great way of making money.It promises possibilities of turning information into money.Besides,buyers can enjoy self-growth from it.What\’s more,this is a reflection（反映） of people\’s respect for knowledge and talents.
④However, "pay-for-knowledge" also causes a few problems.For one thing,the market is full of eye-catching words such as"How to be a good CEO?"which sounds like if you pay for it,you are sure to succeed.For another,a large number of customers buy them just for showing off.
⑤In general,the best is the one that suits you most. "Pay-for-knowledge"may be used as a good start for self-growth.But be careful when you make a choice,or your dream of success may not come true.

（1）The "pay-for-knowledge" industry is developing rapidly because of the following reasons EXCEPT ______.
A.people today don\’t want to miss information
B.the traditional education system doesn\’t work
C.today\’s job market needs people to be more skilled
D.there is a fast network and a smart phone nowadays
（2）What can we learn about"pay-for-knowledge"industry from Paragraph 3? ______
A.The history of its development.
B.The problems of its products.
C.The advantages（优点） of its products.
D.The future of this industry.
（3）The structure of the passage may be ______.
A.
B.
C.
D.
（4）The best title for this passage may be ______.
A.Learn Knowledge by Ourselves Online
B.Buy"Pay-for-Knowledge"Products
C.Stop Trying Any of"Pay-for-Knowledge"Products
D.Choose"Pay-for-Knowledge"Products Wisely