09-1   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.

  assiduous              勤奋的

  = hard , arduous, diligent

  词根sid 表示”坐”

  preside                主持(over)

  inside                  在里边

  insidious               阴险的

  consider                考虑

  derelict                遗弃物

  relict                   遗风，遗俗

  penetrate              渗透

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