Tom's mother kept telling him that he should work harder, but ______ didn't help.   [ ]

A. he          

B. which          

C. she          

D. it

对从业人员来说，爱岗敬业要做到（）。

A.终身从事一种职业

B.不能对工作有功利主义观念

C.树立积极的职业理想

D.提高职业技能