This made him wonder more and more; for it was plain from the replies of the two boys that they had both been there; and Oliver naturally wondered how they could possibly have found time to be so very industrious.
There are no more uses of "industrious" in the book.
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She is likely to succeed in the job because she is smart, friendly, and industrious.
She is the most industrious of all Tashi’s father’s widows, and her fields are praised for their cleanliness, productivity and general attractiveness.