To what do you owe the tremendous (succeed) ____________ of your business?
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Some education advisers have (relation) ____________ the drop in the standard of students’ performance with the increase in the size of classes.
Paul is directly (responsibility) ____________ for the efficient running of the office.
It was with great (sad) ____________ that I heard of your husband’s death.
The project has attracted considerable criticism from the (science) ____________ community.