The difficulties they are facing are just beyond though they are determined to continue their research.
A. way
B. belief
C. thing
D. matter
网友回答
A. way
(答案→)B. belief
C. thing
D. matter
解析：考查名词：A. way 方式B. belief想法，信念C. thing事情D. matter麻烦，beyond belief难以相信，句意：虽然他们决定继续研究，他们面临的困难是难以相信的。选B。