问题
单项选择题
A. There are vacancies for 18 more club members in the team.
B. There are training courses in the bungee-jumping club.
C. There are pre-requisites for participating in the sport.
D. There are bungee-jumping sports clubs all over the country.
答案
参考答案：C
解析：
If you intend to try bungee-jumping, most countries require that you be over the age of 18 and join a bungee-jumping club or be properly instructed for the sport.
