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

601. Verbs of involuntary perceptions ... (2278 candidates)
602. Infinitive, continued ! (1967 candidates)
603. Infinitive after verbs expressing will power ... (8486 candidates)
604. Not everyone has ... (2177 candidates)
605. What about suggesting ... (3994 candidates)
606. Difficulties of the Passive Form (16210 candidates)
607. 'Make someone do'/'Have something done': (a little further) (42673 candidates)
608. We'd still like to work on more tenses ...(2/2) (1737 candidates)
609. We want to work with tenses ...(1/2) (2394 candidates)
610. Two simultaneous actions in the past ... (12437 candidates)
611. Cause ? Aim? Not mixing the two concepts ... (22117 candidates)
612. Absence of obligation (24990 candidates)
613. To talk someone into / out of doing something ... (2429 candidates)
614. Difficulties in Reported Speech (15465 candidates)
615. Will and Would: a little further (7199 candidates)
616. Used to / to be used to (33907 candidates)
617. Present continuous (11892 candidates)
618. Past simple and continuous (8903 candidates)
619. Express future (11955 candidates)
620. Express future (7064 candidates)