tests by here4u with the online test builder (650 tests)

41. Modal auxiliaries in the past. (5087 candidates)
42. To see and to hear + ing/ bare infinitive (6450 candidates)
43. Word Stress (2) (2431 candidates)
44. Word Stress (1) (3010 candidates)
45. Pronunciation of the final sound -ED (4238 candidates)
46. A few difficulties with pronunciation (3419 candidates)
47. Vocabulary: doing things... (4191 candidates)
48. Vocabulary: Taking a holiday (4355 candidates)
49. Can/ could/ can't and equivalents (1313 candidates)
50. By? By the time? Until? (6161 candidates)
51. Made of? from? with? or out of? (6192 candidates)
52. Standard or casual registers? (2677 candidates)
53. Conditions (2426 candidates)
54. Vocabulary: belonging and possessing (449 candidates)
55. Subject-verb inversions (4081 candidates)
56. Word order: no subject - verb inversion (645 candidates)
57. To be to? or To have to? (906 candidates)
58. Infinitive (without 'to') (243 candidates)
59. Infinitive form (4948 candidates)
60. Gerund (5346 candidates)