1. The winding stairs __________ steep. (is/are)

 

2. This is the only _______ I understand — honest and transparant. (politic/politics)

 

3. ______________ is his strong point. (mathematic/mathematics)

 

4. ______________ teachers meat annualy at AAME conference. (mathematic/mathematics)

 

5. The ____________ that hit the USA seems to be coming to an end. (crisis/crises)

 

6. The succession of __________ struck the economy of the USA. (crisis/crises)

 

7. This specific _____________ about the employee strengthened the decision to get rid of him. (datum/data)

 

8. All this huge lot of ____________ set the foundation for a new theory. (datum/data)

 

9. The ____________ of Northern Lights must be further investigted. (phenomenon/phenomena)

 

10. The strange _____________ in British fields induce the thoughts about aliens. (phenomenon/phenomena)

 

11. All his clothes _________ old and shabby. (was/were)

 

12. I am going to give you _____________ of advice. (an/a piece)

 

13. The tree was all in _______________ (blossom/blossoms).

 

14. The tree was all covered with young (blossom/blossoms).

 

15. They start ____________ new documentary series about the lives of servicemen (—/a)

 

16. ________________ must have done me a lot of good. (fruit/fruits)

 

17. She chose particularly fresh ________________ to decorate the New Year table. (fruit/fruits)

 

18. A few___________ was all he caught. (fish/fishes)

 

19. All the ___________ caught today will be sent to the wholesale market. (fish/fishes)

 

20. All the efforts will surely bear ________ . (fruit/fruits)