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

521. Possessive idioms (3116 candidates)
522. Possessive or genitive Case (27594 candidates)
523. Possessive adjectives and pronouns. (25746 candidates)
524. Adjectives: where to place them? (17675 candidates)
525. Adverbs: Where to place them? 2 (5078 candidates)
526. Adverbs: Where to place them? 1 (12059 candidates)
527. For/Since: second step... (4018 candidates)
528. For/Since: first step ... (7168 candidates)
529. Make someone do/ Be made to do (10656 candidates)
530. Like/to like/likely... (4982 candidates)
531. Let's get dressed... (6489 candidates)
532. Other - The others - Another (4184 candidates)
533. Dream and Back to reality 2/2 (4313 candidates)
534. Dream Holiday 1/2 (2383 candidates)
535. Can't help or Prevent (3185 candidates)
536. Can/could/may... Must/have to... (26965 candidates)
537. Too much ... Much too... (8304 candidates)
538. May, Might, Should... what they mean... (24768 candidates)
539. Expressing Uncertainty : may-might-must... (21137 candidates)
540. When, While, Till etc, expressing time. (5683 candidates)