tests by here4u with the online test builder (669 tests)

601. To say / to tell ... (3358 candidates)
602. Too - Also - As well - Either - Not either (10218 candidates)
603. Let's come or Let's go (6420 candidates)
604. Use of tenses : The worst enemy ? The best friend ? 2/2 (4035 candidates)
605. Use of tenses : The worst enemy ? The best friend ? 1/2 (9373 candidates)
606. Uncountables and Countables (4061 candidates)
607. Too (much/many) or Enough (3709 candidates)
608. Verbs of involuntary perceptions ... (2280 candidates)
609. Infinitive, continued ! (2002 candidates)
610. Infinitive after verbs expressing will power ... (8599 candidates)
611. Not everyone has ... (2180 candidates)
612. What about suggesting ... (4134 candidates)
613. Difficulties of the Passive Form (16322 candidates)
614. 'Make someone do'/'Have something done': (a little further) (42939 candidates)
615. We'd still like to work on more tenses ...(2/2) (1746 candidates)
616. We want to work with tenses ...(1/2) (2403 candidates)
617. Two simultaneous actions in the past ... (12524 candidates)
618. Cause ? Aim? Not mixing the two concepts ... (22582 candidates)
619. Absence of obligation (25165 candidates)
620. To talk someone into / out of doing something ... (2487 candidates)