Sadly, Marie Curie died from to too much radiation.
A. being exposed
B. exposing
C. exposed
D. having exposed
网友回答
(答案→)A. being exposed
B. exposing
C. exposed
D. having exposed
解析：句意：令人伤心的是，居里夫人死于接触太多的辐射。Sb be exposed to sth接触于，因为放在介词之后所以应该用动名词，故选A。