tests by zilazila with the online test builder (251 tests)
Ranked by: number of candidates
1. Any- No (198087 candidates)
2. Intensifiers (27991 candidates)
3. Too - Either (24744 candidates)
4. As.....As (17713 candidates)
5. Stop and Gerunds or Infinitives (13045 candidates)
6. Like - Alike (11828 candidates)
7. One - ones (10879 candidates)
8. Conditional sentences type 3 (9430 candidates)
9. Maybe or May be (8498 candidates)
10. Future Perfect tense (7123 candidates)
11. Such ....that - So.....that (6361 candidates)
12. Wh- clause - Noun clause (5779 candidates)
13. Should or Shouldn't (5133 candidates)
14. Relative clauses (4857 candidates)
15. Inversion After Negative Adverbials (4562 candidates)
16. Countable and Uncountable Nouns (4448 candidates)
17. Proper requests (4155 candidates)
18. Passive and conditional sentences (4104 candidates)
19. Phrasal verbs using do (3997 candidates)
20. Alone - Lonely - Only (3965 candidates)