tests by leopold with the online test builder (78 tests)
Ranked by: number of candidates
1. A lot of, Much, Many (21490 candidates)
2. Made from, Made of, Made out of, Made with (17171 candidates)
3. Will or Would (16795 candidates)
4. How much/ how long/ how often/ how well (15664 candidates)
5. Worse or Worst (11893 candidates)
6. Had better or Would rather (11292 candidates)
7. So, Too or Very (9396 candidates)
8. Hate, Like, Love or Prefer (7786 candidates)
9. About to, bound to, due to (7451 candidates)
10. No one, nobody, nothing, nowhere (6621 candidates)
11. Elder, older, eldest, oldest (6400 candidates)
12. Can, should, must, could (5873 candidates)
13. To or Too (4998 candidates)
14. Difference between In and On (4839 candidates)
15. Below or under (4701 candidates)
16. Even - even if - even though (4369 candidates)
17. No, None, Not a, Not any (4226 candidates)
18. As if, like and as (3661 candidates)
19. Pronouns: this, that, these and those (3585 candidates)
20. Relative pronouns: who,whom,where,whose (3529 candidates)