Answer:
knowledge is the common noun in this sentence.
Her doctor believed that intellectual effort was making her ill. Women were not supposed to exert themselves much physically." was the social attitude of Gilman’s era that the excerpt best demonstrates.
1. The deep pond is DANGEROUS for small children.
2. We use sugar to SWEETEN tea.
3. My father found EMPLOYMENT in a bank.
4. Money does not always bring HAPPINESS.
5. The two girls came to an AGREEMENT which made them both happy.
6. I saw the most AMAZING sunset over the sea.
7. The computer was a great INVENTION.
8. There was a serious COLLISION on the highway.
9. Did you get PERMISSION to leave school early?
10. The family had made a RESERVATION at the restaurant.
Hope this helps! Please let me know if I'm wrong :)