tests by hidalgo with the online test builder (950 tests)

501. Tanto (8883 candidates)
502. From another tense to present tense (1800 candidates)
503. Gérondif ou participe passé (10023 candidates)
504. #el que#lo que (4885 candidates)
505. Diminutive words (4330 candidates)
506. Simple past - irregular verbs (70332 candidates)
507. Personal pronouns (1319 candidates)
508. Muy/Mucho (29229 candidates)
509. Pretérito indefinido / Conditional present (5306 candidates)
510. Synonyms (verbs) (12476 candidates)
511. Esta - está - ésta (20246 candidates)
512. Enclisis (9879 candidates)
513. Present - Irregular verbs (2640 candidates)
514. Present - Regular verbs (8644 candidates)
515. Possessive adjectives (11696 candidates)
516. Imperative no (39264 candidates)
517. Possessive adjectives (18971 candidates)
518. Missing words (1296 candidates)
519. Personal pronouns (6733 candidates)
520. Articles (16348 candidates)