I can't imagine how he finished the relay race, ______ his foot wounded so seriously.[ ]

A. as

B. for

C. with

D. because of

长江沿岸地带大部分地区位于我国[ ]

A．亚热带、湿润区    

B．亚热带、半湿润区  

C．热带、湿润区      

D．热带、半湿润区