单选题 In a competitive and fast-paced modern society, busy business executives are so______their work that they hardly know what the word leisure means.

A、 engrossed in
B、 exempt from
C、 skeptical of
D、 extraneous to

【正确答案】 A

【答案解析】解析：A．engrossed in全神贯注于某事，热衷于；B．exempt from豁免，免除；C．be skeptical of怀疑的；D．extraneous to与……无关。