Einstein was usually his scientific study that he even forgot to eat.
A. very absorbing
B. very absorbed in
C. so absorbed in
D. such absorbed in
网友回答
A. very absorbing
B. very absorbed in
(答案→)C. so absorbed in
D. such absorbed in
解析：考查固定结构。固定短语be absorbed in…沉迷于…；以及固定句式so…that…如此…以至于…；句意：爱因斯坦如此沉迷于他的科学研究以至于忘记吃东西。故C正确。