tests by zilazila with the online test builder (251 tests)
Ranked by: number of candidates
1. Any- No (198081 candidates)
2. Intensifiers (27942 candidates)
3. Too - Either (24584 candidates)
4. As.....As (17660 candidates)
5. Stop and Gerunds or Infinitives (12686 candidates)
6. Like - Alike (11749 candidates)
7. One - ones (10782 candidates)
8. Conditional sentences type 3 (9372 candidates)
9. Maybe or May be (8407 candidates)
10. Future Perfect tense (7046 candidates)
11. Such ....that - So.....that (6355 candidates)
12. Wh- clause - Noun clause (5647 candidates)
13. Should or Shouldn't (5116 candidates)
14. Relative clauses (4712 candidates)
15. Inversion After Negative Adverbials (4515 candidates)
16. Countable and Uncountable Nouns (4443 candidates)
17. Proper requests (4152 candidates)
18. Passive and conditional sentences (4063 candidates)
19. Phrasal verbs using do (3982 candidates)
20. Alone - Lonely - Only (3932 candidates)