tests by here4u with the online test builder (678 tests)

501. Numbers and dates... (Level 1) (18949 candidates)
502. Numbers and Dates... ( Level 2) (8117 candidates)
503. I'd better... I'd rather... (24048 candidates)
504. When : What tense to put behind... (31932 candidates)
505. Vocabulary: Animal sounds/cries (12425 candidates)
506. Vocabulary: Emergency - First aid... (29040 candidates)
507. Expressing time: by... , by the time..., once... (5978 candidates)
508. Before - In front of - Opposite... (8587 candidates)
509. Vocabulary: Swimming, diving... (2714 candidates)
510. Who - What - Which (24426 candidates)
511. Infinitive implied by its particle. (3369 candidates)
512. Doing, Do, To do... (9417 candidates)
513. Choosing your past tense... (48094 candidates)
514. Tenses : satisfying the request... (2) (2185 candidates)
515. The use of tenses: a strange request...(1) (3622 candidates)
516. Either...or/ Neither...nor/ Not ... either. (13505 candidates)
517. There is / are, and other forms... (5103 candidates)
518. To be / to have: -ing forms... (4309 candidates)
519. Enough with the Present Perfect... (21974 candidates)
520. Whose and use (5484 candidates)