Fill in the blank in each of the following sentences with a suitable preposition or adverb. 1. Speeches distinguish human beings __________ animals. 2. The idle son gives himself no concern __________ his father's illness. 3. Is it not in the nature of all human beings to yearn __________ freedom? 4. The real dignity of a man lies __________ what he is, not in what he has. 5. The online courses have constituted a real challenge__________ the regular courses. 6. Advancing culture is bound to triumph __________ declining culture. 7. Patience combined __________ diligence is necessary to success. 8. His version of events flies in the face __________ all the evidence. 9. Friction gradually caused the sliding box to slow __________ and stop. 10. A committee was set __________ to look into the workers' grievances.