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

661. For - since - ago and tenses (5930 candidates)
662. Use of tenses in a text (14205 candidates)
663. Rephrasing of verbs (4102 candidates)
664. Some forms of verbs (1826 candidates)
665. Prepositions and particles (1537 candidates)
666. To do or To make (2407 candidates)
667. To do or Not to do (1630 candidates)
668. A few difficult words (3084 candidates)
669. Question tags (1302 candidates)
670. Need of articles (2084 candidates)
671. Compound adjectives (2438 candidates)
672. Particles (1474 candidates)
673. From plural to singular (5245 candidates)
674. Particles (2021 candidates)
675. Question tags (1344 candidates)
676. Verbs in several tenses (3467 candidates)
677. Countable or uncountable (2659 candidates)
678. Verbs followed by Infinitive or gerund (5052 candidates)
679. Civilisation of the USA (5378 candidates)