Rather than ______ to a secure life, the young man prefers wandering about in big cities, enjoying himself. 

A．settle down

B．to settle down

C．settling down

D．settled down

青蛇毒发病与下列哪种邪气有关

A．燥热之邪

B．湿热之邪

C．寒湿之邪

D．风热之邪

E．暑热之毒