Pick out the most effective word from the given words to fill in the blank in each sentence to make the sentence meaningfully complete.
They work hard not because of the __ , but because of their inner urge.
His __ background has made him so docile.
It is __ for everyone to abide by the laws of the land.
___ he is a hard worker, his quality of work is not of a desirable level.
In spite of repeated instructions, he __ the some mistakes.