UNIT 4
1. His employers could not complain about his work because he was ______ in the performance of his duties.
A. derelict B. penetrating C. diversified D. assiduous.
employer 雇主，老板
employee 雇員
assiduous 勤奮的
insidious 陰險(xiǎn)的，狡詐的
derelict 遺棄物
relics 遺骨
relict 殘余物
penetrate 穿透
permeate 滲透
diffuse 彌漫
diversify 使不同
