We should not forget our ____________ (responsible) for protecting nature. 2. Nobody can touch the clock without____________ (permit). 3. College students are not totally ____________ (depend) on their parents. 4. Not knowing anyone at the party made her feel _____________ (comfortalbe). 5. We should repect others'_________ (private). 6. — What's the __________ (different) between high school and college. — In my opinion, college life means more _________ (free).