tests by here4u with the online test builder (679 tests)

21. Likely/unlikely - Willing/ unwilling (55 candidates) [Being reviewed]
22. 'Whose' and idiomatic possessive forms... (4085 candidates)
23. Preference: I'd rather go.../ I'd rather you went (4697 candidates)
24. Verbs in the -ing form, or not? (5573 candidates)
25. Verbs with two object complements (3146 candidates)
26. Vocabulary: some time/ sometime/ sometimes (4433 candidates)
27. Doubling the final consonant, or not? (5115 candidates)
28. Vocabulary: steal or rob? remember or remind? (4812 candidates)
29. Civilisation: Thanksgiving and Black Friday (2821 candidates)
30. Idioms: the weather (2720 candidates)
31. Concession (4904 candidates)
32. Idioms: men and women (301 candidates)
33. Reduced forms (3926 candidates)
34. Modal auxiliaries in the past. (4770 candidates)
35. To see and to hear + ing/ bare infinitive (6350 candidates)
36. Word Stress (2) (2308 candidates)
37. Word Stress (1) (2838 candidates)
38. Pronunciation of the final sound -ED (3970 candidates)
39. A few difficulties with pronunciation (3310 candidates)
40. Vocabulary: doing things... (4165 candidates)