tests by here4u with the online test builder (675 tests)

641. Increase your vocabulary 1-4 Synthesis (2937 candidates)
642. Increase your vocabulary 1-3 (2829 candidates)
643. Increase your vocabulary 1-2 (4394 candidates)
644. Increase your vocabulary (9558 candidates)
645. Relatives (2116 candidates)
646. Forms of verbs (3157 candidates)
647. If clauses (5820 candidates)
648. Present simple or continuous (29432 candidates)
649. Present simple (11619 candidates)
650. Present continuous (8726 candidates)
651. Forms of verbs (7401 candidates)
652. V - ing or infinitive (5327 candidates)
653. Relative pronouns (3077 candidates)
654. Prepositions and particles (1660 candidates)
655. Conditional present and past (25470 candidates)
656. Rephrasing and modals (11634 candidates)
657. For - since - ago and tenses (5913 candidates)
658. Use of tenses in a text (14178 candidates)
659. Rephrasing of verbs (4083 candidates)
660. Some forms of verbs (1817 candidates)