tests by zilazila with the online test builder (251 tests)
Ranked by: number of candidates
1. Any- No (198084 candidates)
2. Intensifiers (27963 candidates)
3. Too - Either (24639 candidates)
4. As.....As (17680 candidates)
5. Stop and Gerunds or Infinitives (12967 candidates)
6. Like - Alike (11765 candidates)
7. One - ones (10799 candidates)
8. Conditional sentences type 3 (9386 candidates)
9. Maybe or May be (8443 candidates)
10. Future Perfect tense (7050 candidates)
11. Such ....that - So.....that (6356 candidates)
12. Wh- clause - Noun clause (5700 candidates)
13. Should or Shouldn't (5124 candidates)
14. Relative clauses (4766 candidates)
15. Inversion After Negative Adverbials (4525 candidates)
16. Countable and Uncountable Nouns (4444 candidates)
17. Proper requests (4153 candidates)
18. Passive and conditional sentences (4080 candidates)
19. Phrasal verbs using do (3990 candidates)
20. Alone - Lonely - Only (3941 candidates)