"is" or "are"

1. Nylon, like orlon  synthetic. 
2. Either his children or his wife arriving today. 
3. Both the chair and the sofa on sale. 
4. Every dog and cat vaccinated against rabies. 
5. There several universities in the city. 
6. It the bicyclists who endanger the joggers. 
7. The New York Times read by many people. 
8. Everyone in the class working hard. 
9. All of the creeks polluted. 
10. All of the water contaminated. 
11. The committee having its meeting. 
12. The committee  separated from their families for long periods of time. 
13. Two hundred dollars a lot of money to lose. 
14. Mathematics a pure science. 
15. A number of doctors employed by the hospital. 
16. The number of female doctors growing. 
17. The English well known for their love of tea. 
18. The hypothesis supported by the data. 
19. The young deer staying near their mothers. 
20. Those species of fish found in Texas lakes. 

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