The scientist knew nothing about the matter because he was always himself in his study.

问题补充：

The scientist knew nothing about the matter, because he was always himself in his study.

A. burying

B. devoting

C. focusing

D. concentrating

答案：

(答案→)A. burying

B. devoting

C. focusing

D. concentrating

解析：考查动词和动词搭配：A. burying 埋葬，bury oneself in…B. devoting奉献，致力于，devote oneslf to …，C. focusing专注，focus…on，D. concentrating专注，concentrate on，句意：科学家不了解这个事情，因为他总是埋头在书房里面。选A。