In the good care of the nurses, the boy is recovering from his heart operation.
A. fluently
B. actually
C. frequently
D. gradually
网友回答
A. fluently
B. actually
C. frequently
(答案→)D. gradually
解析：副词辨析。A流利地；B实际上；C频繁地；D逐渐地；句意：在护士的悉心照顾下，照顾男孩慢慢地从心脏病中恢复过来.故D正确。