Doctors are interested in using lasers as a surgical tool in operations on people who are（）to heart attack.
A、disposed
B、infectious
C、prone
D、accessible
【正确答案】：C
【题目解析】：此处需填一个与to搭配的形容词，be disposed to do sth. 想做某事，准备做某事；infectious传染性的，有感染力的（常作表语或定语）；be prone to sth. / to do sth.易于...／有做...的倾向；be accessible to易接近的，易进入的。句意为：医生对用激光来给易患心脏的人们做手术很感兴趣。因此应选C
