tests by here4u with the online test builder (675 tests)

521. Possessive or genitive Case (27593 candidates)
522. Possessive adjectives and pronouns. (25731 candidates)
523. Adjectives: where to place them? (17674 candidates)
524. Adverbs: Where to place them? 2 (5075 candidates)
525. Adverbs: Where to place them? 1 (12046 candidates)
526. For/Since: second step... (4004 candidates)
527. For/Since: first step ... (7167 candidates)
528. Make someone do/ Be made to do (10652 candidates)
529. Like/to like/likely... (4982 candidates)
530. Let's get dressed... (6487 candidates)
531. Other - The others - Another (4183 candidates)
532. Dream and Back to reality 2/2 (4309 candidates)
533. Dream Holiday 1/2 (2383 candidates)
534. Can't help or Prevent (3184 candidates)
535. Can/could/may... Must/have to... (26951 candidates)
536. Too much ... Much too... (8303 candidates)
537. May, Might, Should... what they mean... (24744 candidates)
538. Expressing Uncertainty : may-might-must... (21130 candidates)
539. When, While, Till etc, expressing time. (5679 candidates)
540. Whereas, Unless, Contrary to : contrasts (31502 candidates)