tests by hidalgo with the online test builder (899 tests)

501. Tanto (8887 candidates)
502. From another tense to present tense (1800 candidates)
503. Gérondif ou participe passé (10026 candidates)
504. #el que#lo que (4886 candidates)
505. Diminutive words (4330 candidates)
506. Simple past - irregular verbs (70342 candidates)
507. Personal pronouns (1319 candidates)
508. Muy/Mucho (29235 candidates)
509. Pretérito indefinido / Conditional present (5306 candidates)
510. Synonyms (verbs) (12478 candidates)
511. Esta - está - ésta (20256 candidates)
512. Enclisis (9879 candidates)
513. Present - Irregular verbs (2640 candidates)
514. Present - Regular verbs (8644 candidates)
515. Possessive adjectives (11699 candidates)
516. Imperative no (39268 candidates)
517. Possessive adjectives (18971 candidates)
518. Missing words (1296 candidates)
519. Personal pronouns (6735 candidates)
520. Articles (16348 candidates)