Question

 He absorbed himself so entirely to his research that ____he made himself ill.

1. A.
   unfortunately
2. B.
   purposefully
3. C.
   hopefully
4. D.
   eventually

Answer 1

D
解析：
句意：他全身心地投入工作，終于病倒了。eventually (="in" the end,at last)最后；終于；unfortunately不幸的；遺憾地；hopefully 懷有希望地；purposefully有決心地，堅定地。