tests by hidalgo with the online test builder (908 tests)

501. #el que#lo que (4884 candidates)
502. Diminutive words (4328 candidates)
503. Simple past - irregular verbs (70280 candidates)
504. Personal pronouns (1319 candidates)
505. Muy/Mucho (29193 candidates)
506. Pretérito indefinido / Conditional present (5302 candidates)
507. Synonyms (verbs) (12474 candidates)
508. Esta - está - ésta (20189 candidates)
509. Enclisis (9875 candidates)
510. Present - Irregular verbs (2640 candidates)
511. Present - Regular verbs (8642 candidates)
512. Possessive adjectives (11690 candidates)
513. Imperative no (39243 candidates)
514. Possessive adjectives (18963 candidates)
515. Missing words (1296 candidates)
516. Personal pronouns (6726 candidates)
517. Articles (16347 candidates)
518. Missing words (1155 candidates)
519. Tenses (6858 candidates)
520. Imperative (5313 candidates)