tests by here4u with the online test builder (678 tests)

601. Use of tenses : The worst enemy ? The best friend ? 1/2 (9310 candidates)
602. Uncountables and Countables (4019 candidates)
603. Too (much/many) or Enough (3701 candidates)
604. Verbs of involuntary perceptions ... (2278 candidates)
605. Infinitive, continued ! (1971 candidates)
606. Infinitive after verbs expressing will power ... (8507 candidates)
607. Not everyone has ... (2178 candidates)
608. What about suggesting ... (4071 candidates)
609. Difficulties of the Passive Form (16240 candidates)
610. 'Make someone do'/'Have something done': (a little further) (42759 candidates)
611. We'd still like to work on more tenses ...(2/2) (1739 candidates)
612. We want to work with tenses ...(1/2) (2397 candidates)
613. Two simultaneous actions in the past ... (12453 candidates)
614. Cause ? Aim? Not mixing the two concepts ... (22309 candidates)
615. Absence of obligation (25082 candidates)
616. To talk someone into / out of doing something ... (2467 candidates)
617. Difficulties in Reported Speech (15472 candidates)
618. Will and Would: a little further (7203 candidates)
619. Used to / to be used to (33934 candidates)
620. Present continuous (11951 candidates)