Many people in the USA love sports. Some people like playing sports and some people like 31 sports. They join different 32 (), such as football club, basketball club or volleyball club. In summer, many students go 33 (swim).
Mike 34 () playing volleyball but he doesn’t like swimming. Andy and Simon love playing football but 35 (them) don’t like swimming. They are 36 (member) of the school football club.
Millie and Sandy like playing table tennis. They 37 (be) great players and win many table tennis matches, 38 they don’t like volleyball.
Mille’s best friend, Lily, is a good badminton(羽毛球) player. She thinks badminton is 39 easy game. She wants 40 (teach) her friends to play badminton in her free time.

31. watching
32. clubs
33. swimming
34. enjoys
35. they
36. members
37. are
38. but
39. an
40. to teach

31. 根据上下文，有些人喜欢做运动，有些人喜欢观看运动，watch sports 看运动，like doing sth. 喜欢做某事，所以此处填watching。
32. different不同的，修饰可数名词复数，club俱乐部，是可数名词，所以此处填clubs。
33. go swimming 去游泳，是固定短语，所以此处填swimming。
34. 主语Mike是第三人称单数，谓语动词用第三人称单数形式，enjoy的第三人称单数形式是enjoys，所以此处填enjoys。
35. 此处指代Andy和Simon，在句中作主语，用人称代词主格they，所以此处填they。
36. member成员，是可数名词，根据主语They可知，此处用复数形式members，所以此处填members。
37. 主语They是复数，be动词用are，所以此处填are。
38. 前后句是转折关系，用but连接，所以此处填but。
39. 此处表示“一场容易的游戏”，easy以元音音素开头，用不定冠词an，所以此处填an。
40. want to do sth. 想要做某事，teach教，是动词，所以此处填to teach。