Theauthorwritesthepassageto_______
A.showusthefunctionofmajorsports
B.encourageustogoinforgreensports
C.discussthemajorinfluenceofpopularsports
D.intr oducedifferenttypesofenvironment-friendlysports
正确答案:B

Theauthorwritesthepassageto_______
A.showusthefunctionofmajorsports
B.encourageustogoinforgreensports
C.discussthemajorinfluenceofpopularsports
D.intr oducedifferenttypesofenvironment-friendlysports
正确答案: