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 (10034 candidates)
504. #el que#lo que (4887 candidates)
505. Diminutive words (4334 candidates)
506. Simple past - irregular verbs (70408 candidates)
507. Personal pronouns (1319 candidates)
508. Muy/Mucho (29241 candidates)
509. Pretérito indefinido / Conditional present (5306 candidates)
510. Synonyms (verbs) (12481 candidates)
511. Esta - está - ésta (20269 candidates)
512. Enclisis (9887 candidates)
513. Present - Irregular verbs (2640 candidates)
514. Present - Regular verbs (8645 candidates)
515. Possessive adjectives (11702 candidates)
516. Imperative no (39284 candidates)
517. Possessive adjectives (18976 candidates)
518. Missing words (1296 candidates)
519. Personal pronouns (6737 candidates)
520. Articles (16350 candidates)