【题目】He was busily ________to cleaning his shoes while his wife was cooking.
A. involved B. supposed
C. occupied D. committed
在线课程【答案】D
【解析】句意：当他的妻子在做饭时，他正忙着清理他的鞋子。involve包含，牵涉；suppose猜想，假设；occupy占据，使忙碌（及物动词）；commit使……承担义务。be committed to doing sth.献身于、致力于做某事。故选D。