Dr.Salk is aware that we still have a long way to go in improving human living conditions and in fighting sickness ___.
问题描述：
Dr.Salk is aware that we still have a long way to go in improving human living conditions and in fighting sickness ___.
选项:
a、where it is found
b、wherever is it found
c、wherever it is found
d、 where is it found
答
句意大概是：Salk博士知道我们在改善人类生活条件和被发现的疾病作斗争方面仍然有很长的一段路要走
a：句式通顺,句意不符
b：句式不符
c：意思是“无论它是在哪里被发现的”
d：句式不符
答案：c
（以上纯属个人见解）