tests by eos17 with the online test builder (394 tests)
Ranked by: number of candidates
1. False friends (31169 candidates)
2. Present simple or continuous (28923 candidates)
3. Open questions (24006 candidates)
4. Past simple (20500 candidates)
5. At/In/To (19031 candidates)
6. Comparison (14854 candidates)
7. Verbs and tenses (14789 candidates)
8. Expression of cause (13259 candidates)
9. False friends (12749 candidates)
10. Adjectives and prepositions (11538 candidates)
11. Confusion and words (11073 candidates)
12. Used to, be used to, get used to (11069 candidates)
13. Coordinating conjunctions (11010 candidates)
14. Infinitive or Gerund? (10995 candidates)
15. Reported speech (10913 candidates)
16. Compound adjectives (10780 candidates)
17. Suffixes in derivation (10097 candidates)
18. Adjective and preposition (9669 candidates)
19. Still/always (9507 candidates)
20. Adjectives and prepositions (9333 candidates)