13. Mathematics (is, are) John's favourite subject.
14. Eight dollars (is, are) the price of a movie these days.
15. (Is, Are) the tweezers in this drawer?
16. Your pants (is, are) at the cleaner's.
17. There (was, were) fifteen candies in that bag. Now there is,
18. The committee (debates, debate) these questions carefully.
19. The committee members (lead, leads) very different lives in
20. All the CDs, even the scratched ones, (is, are) in this case.