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

501. Tanto (8889 candidates)
502. From another tense to present tense (1800 candidates)
503. Gérondif ou participe passé (10027 candidates)
504. #el que#lo que (4886 candidates)
505. Diminutive words (4330 candidates)
506. Simple past - irregular verbs (70351 candidates)
507. Personal pronouns (1319 candidates)
508. Muy/Mucho (29238 candidates)
509. Pretérito indefinido / Conditional present (5306 candidates)
510. Synonyms (verbs) (12479 candidates)
511. Esta - está - ésta (20263 candidates)
512. Enclisis (9879 candidates)
513. Present - Irregular verbs (2640 candidates)
514. Present - Regular verbs (8644 candidates)
515. Possessive adjectives (11700 candidates)
516. Imperative no (39274 candidates)
517. Possessive adjectives (18973 candidates)
518. Missing words (1296 candidates)
519. Personal pronouns (6735 candidates)
520. Articles (16350 candidates)