tests by eos17 with the online test builder (394 tests)
Ranked by: number of candidates
1. False friends (31135 candidates)
2. Present simple or continuous (28885 candidates)
3. Open questions (23861 candidates)
4. Past simple (20427 candidates)
5. At/In/To (18979 candidates)
6. Verbs and tenses (14788 candidates)
7. Comparison (14774 candidates)
8. Expression of cause (13237 candidates)
9. False friends (12720 candidates)
10. Adjectives and prepositions (11505 candidates)
11. Confusion and words (11009 candidates)
12. Infinitive or Gerund? (10994 candidates)
13. Coordinating conjunctions (10971 candidates)
14. Used to, be used to, get used to (10866 candidates)
15. Reported speech (10813 candidates)
16. Compound adjectives (10777 candidates)
17. Suffixes in derivation (10094 candidates)
18. Adjective and preposition (9667 candidates)
19. Still/always (9493 candidates)
20. Adjectives and prepositions (9329 candidates)