13. The school authority decided to build some facility for the ball games.
校方决定建造球类运动设施。
还能这样说：
The school authority made a decision to build some infrastructure for ball games.
Some infrastructure particular for ball games was to be constructed by the school authority.
谚语：
Nothing seek, nothing find.
无所求，无所获。
14. Playing basketball can release the pressure from the work.
打篮球可以减缓工作压力。
还能这样说：
Playing basketball can relax ourselves from the stress of work.
Playing basketball provides us a way to free ourselves from work stress.
应用解析：
news release 新闻报道，发布新闻
15. Football has grown to the world's most popular sport.
足球已成为世界上最为流行的运动。
还能这样说：
Football has become the most widely fashionable all over the world.
Football has prevailed over other balls for people around the world.
应用解析：
prevail against a person 胜过某人;
silence prevailed 一片寂静
16. How many years have you been playing basketball?
你打篮球多少年了?
还能这样说：
How long have you been playing basketball?
Can you tell me how many years you have been playing basketball?
应用解析：
all the year around 整年，全年;
for years 很长时间;
year after year 要很长时间;
put years on sb. 使某人觉得或显得老些;
year in, year out 年复一年;
year-book 年鉴
17. What are the differences between softball and baseball?
垒球与棒球有什么区别?
还能这样说：
What makes softball different from baseball?
What is the distinction between softball and baseball?
应用解析：
with a difference 特别的，与众不同的;
split the difference 折中，妥协