题目内容：
第45题________
A．True or not, there may be a safer way to teach hitting than to make younger players pay a price for it in head injuries. B．However, it's hard to change a sports culture so connected with who we are as a country.
C．A bad head injury of Sidney Crosby, the hockey's greatest star, opened the eyes of hockey people everywhere.
D．It may also control the loss of thousands of young players who don’t enjoy that environment.
E． The USA is trying to show that it's possible to teach hockey protective skills without putting 11 and 12-year-olds in greater danger. It's worth the try.
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