.Mr. Richard hasn’t got any time to play golf these days because he is in the research of

问题补充：

.Mr. Richard hasn’t got any time to play golf these days,because he is in the research of bird language.

A. devoted

B. concentrated

C. buried

D. spared

答案：

A. devoted

B. concentrated

(答案→)C. buried

D. spared

解析：be buried in “专心做……”；devote...to...“致力于做……”；concentrate on “专心做……”。