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

601. Such a strange trial ... 2/2 Mix of tenses (1934 candidates)
602. Such a strange trial ...1/2 Past perfect (2026 candidates)
603. Quite or Quiet (1444 candidates)
604. Preterite or Present Perfect (20457 candidates)
605. To say / to tell ... (3367 candidates)
606. Too - Also - As well - Either - Not either (10246 candidates)
607. Let's come or Let's go (6433 candidates)
608. Use of tenses : The worst enemy ? The best friend ? 2/2 (4050 candidates)
609. Use of tenses : The worst enemy ? The best friend ? 1/2 (9420 candidates)
610. Uncountables and Countables (4082 candidates)
611. Too (much/many) or Enough (3721 candidates)
612. Verbs of involuntary perceptions ... (2286 candidates)
613. Infinitive, continued ! (2022 candidates)
614. Infinitive after verbs expressing will power ... (8629 candidates)
615. Not everyone has ... (2191 candidates)
616. What about suggesting ... (4144 candidates)
617. Difficulties of the Passive Form (16404 candidates)
618. 'Make someone do'/'Have something done': (a little further) (43034 candidates)
619. We'd still like to work on more tenses ...(2/2) (1748 candidates)
620. We want to work with tenses ...(1/2) (2405 candidates)