tests by here4u with the online test builder (672 tests)

641. Increase your vocabulary (9549 candidates)
642. Relatives (2116 candidates)
643. Forms of verbs (3156 candidates)
644. If clauses (5796 candidates)
645. Present simple or continuous (29377 candidates)
646. Present simple (11613 candidates)
647. Present continuous (8724 candidates)
648. Forms of verbs (7401 candidates)
649. V - ing or infinitive (5320 candidates)
650. Relative pronouns (3075 candidates)
651. Prepositions and particles (1660 candidates)
652. Conditional present and past (25460 candidates)
653. Rephrasing and modals (11633 candidates)
654. For - since - ago and tenses (5913 candidates)
655. Use of tenses in a text (14167 candidates)
656. Rephrasing of verbs (4083 candidates)
657. Some forms of verbs (1817 candidates)
658. Prepositions and particles (1534 candidates)
659. To do or To make (2404 candidates)
660. To do or Not to do (1624 candidates)