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

21. Vocabulary: lose, waste: in many ways... (3433 candidates)
22. Vocabulary: verbs + ing or the infinitive (4575 candidates)
23. Order of adjectives. (3667 candidates)
24. Possession - vocabulary (3657 candidates)
25. Focus sur SHOULD/ OUGHT TO: necessity and duty. (3894 candidates)
26. Resultatives (2927 candidates)
27. Confusion : to make up for something? to catch up with someb (29 candidates) [Being reviewed]
28. Focus on MUST: an ambiguous modal auxiliary. (3940 candidates)
29. Focus on MAY: Possibility and permission. (3867 candidates)
30. Focus on CAN: incapacity and impossibility. (4485 candidates)
31. Recycling waste... - Vocabulary (2919 candidates)
32. Likely/unlikely - Willing/ unwilling (135 candidates) [Being reviewed]
33. 'Whose' and idiomatic possessive forms... (4683 candidates)
34. Preference: I'd rather go.../ I'd rather you went (5213 candidates)
35. Verbs in the -ing form, or not? (5704 candidates)
36. Verbs with two object complements (3236 candidates)
37. Vocabulary: some time/ sometime/ sometimes (4547 candidates)
38. Doubling the final consonant, or not? (5251 candidates)
39. Vocabulary: steal or rob? remember or remind? (4901 candidates)
40. Civilisation: Thanksgiving and Black Friday (2929 candidates)