tests by here4u with the online test builder (627 tests)

21. Idioms: the weather (2657 candidates)
22. Concession (4756 candidates)
23. Idioms: men and women (280 candidates)
24. Reduced forms (3872 candidates)
25. Modal auxiliaries in the past. (4608 candidates)
26. To see and to hear + ing/ bare infinitive (6272 candidates)
27. Word Stress (2) (25 candidates) [Being reviewed]
28. Word Stress (1) (53 candidates) [Being reviewed]
29. Pronunciation of the final sound -ED (3842 candidates)
30. A few difficulties with pronunciation (3233 candidates)
31. Vocabulary: doing things... (4111 candidates)
32. Vocabulary: Taking a holiday (4284 candidates)
33. Can/ could/ can't and equivalents (1019 candidates)
34. By? By the time? Until? (5987 candidates)
35. Made of? from? with? or out of? (6036 candidates)
36. Standard or casual registers? (29 candidates) [Being reviewed]
37. Conditions (2332 candidates)
38. Vocabulary: belonging and possessing (388 candidates)
39. Subject-verb inversions (3949 candidates)
40. Word order: no subject - verb inversion (612 candidates)