tests by hidalgo with the online test builder (965 tests)

521. Simple past - irregular verbs (71323 candidates)
522. Personal pronouns (1330 candidates)
523. Muy/Mucho (29532 candidates)
524. Pretérito indefinido / Conditional present (5321 candidates)
525. Synonyms (verbs) (12489 candidates)
526. Esta - está - ésta (20444 candidates)
527. Enclisis (9952 candidates)
528. Present - Irregular verbs (2643 candidates)
529. Present - Regular verbs (8695 candidates)
530. Possessive adjectives (11748 candidates)
531. Imperative no (39844 candidates)
532. Possessive adjectives (18998 candidates)
533. Missing words (1300 candidates)
534. Personal pronouns (6794 candidates)
535. Articles (16363 candidates)
536. Missing words (1158 candidates)
537. Tenses (6873 candidates)
538. Imperative (5327 candidates)
539. Prepositions (2996 candidates)
540. Gerund (119022 candidates)