tests by leopold with the online test builder (78 tests)
Ranked by: number of candidates
1. A lot of, Much, Many (21484 candidates)
2. Made from, Made of, Made out of, Made with (17081 candidates)
3. Will or Would (16756 candidates)
4. How much/ how long/ how often/ how well (15604 candidates)
5. Worse or Worst (11868 candidates)
6. Had better or Would rather (11286 candidates)
7. So, Too or Very (9370 candidates)
8. Hate, Like, Love or Prefer (7755 candidates)
9. About to, bound to, due to (7414 candidates)
10. No one, nobody, nothing, nowhere (6615 candidates)
11. Elder, older, eldest, oldest (6385 candidates)
12. Can, should, must, could (5831 candidates)
13. To or Too (4991 candidates)
14. Difference between In and On (4826 candidates)
15. Below or under (4688 candidates)
16. Even - even if - even though (4325 candidates)
17. No, None, Not a, Not any (4220 candidates)
18. As if, like and as (3645 candidates)
19. Pronouns: this, that, these and those (3578 candidates)
20. Relative pronouns: who,whom,where,whose (3516 candidates)