问题
选择题
seems to be one of the main reasons for many people in today’s world.
A．Having an adventure; to travel
B．To have an adventure; traveling
C．Have an adventure; to travel
D．To give an adventure; traveling
答案
答案：A
seems to be one of the main reasons for many people句中缺少主语，排除C;而不定式作主语表示具体的一次行为，本句是泛指冒险这一行为，所以也排除B和D。选A。