tests by here4u with the online test builder (650 tests)

601. Use of tenses : The worst enemy ? The best friend ? 2/2 (4033 candidates)
602. Use of tenses : The worst enemy ? The best friend ? 1/2 (9344 candidates)
603. Uncountables and Countables (4027 candidates)
604. Too (much/many) or Enough (3707 candidates)
605. Verbs of involuntary perceptions ... (2279 candidates)
606. Infinitive, continued ! (1974 candidates)
607. Infinitive after verbs expressing will power ... (8514 candidates)
608. Not everyone has ... (2178 candidates)
609. What about suggesting ... (4075 candidates)
610. Difficulties of the Passive Form (16253 candidates)
611. 'Make someone do'/'Have something done': (a little further) (42785 candidates)
612. We'd still like to work on more tenses ...(2/2) (1739 candidates)
613. We want to work with tenses ...(1/2) (2397 candidates)
614. Two simultaneous actions in the past ... (12460 candidates)
615. Cause ? Aim? Not mixing the two concepts ... (22336 candidates)
616. Absence of obligation (25105 candidates)
617. To talk someone into / out of doing something ... (2469 candidates)
618. Difficulties in Reported Speech (15474 candidates)
619. Will and Would: a little further (7208 candidates)
620. Used to / to be used to (33942 candidates)