subject verb agreement

The price of these jeans is reasonable.

2. The books borrowed from the library are on my desk.

3. The boy who won the two medals is a friend of mine.

4. Bread and butter is our daily food.

5. The famous singer and composer has arrived.

6. Collecting match-boxes is one of his favourite pastimes.

7. The quality of the candies is poor.

8. Neither his father nor his mother plays mahjong.

9. Neither parent  is fond of playing mahjong.

10. None of my friends was there.

11. Many a student has made the same mistake.

12. Gold, as well as platinum,has  recently risen in price.

13. The boss, as well as his colleagues,has been robbed by the robber.

14. Ten tons is a heavy load.

15. Fifty miles is a long distance.

16. Thirty years is a long time.

17. One of the books has  been missing.

18. The poor are suffering.

19. You should decide which one of the three choices A, B, or C best answers the question.

20. One of the most intelligent students who score full marks is John.

21. The only one of these most intelligent students who is under 18 is Peter.

22. One of these most intelligent students whose example is being followed is John.