tests by hidalgo with the online test builder (705 tests)

501. Imperative: affirmation & negation (5938 candidates)
502. Ser/Estar (5583 candidates)
503. Prepositions (1506 candidates)
504. Preterite tense (Pretérito indefinido) (10304 candidates)
505. Expressions with TENER (1021 candidates)
506. Conjunctions Y(E), O (U) (4303 candidates)
507. Prepositions (2027 candidates)
508. Clothes (1756 candidates)
509. Por qué, por que, porque, porqué (1565 candidates)
510. Infinitive or "que + subjunctive" in a subordinate (2824 candidates)
511. Prepositions (1426 candidates)
512. Personal pronouns (852 candidates)
513. Gender of nouns (916 candidates)
514. Antonyms (1486 candidates)
515. Present => Past and vice versa (996 candidates)
516. Imperative mood (affirmative and negative commands) (959 candidates)
517. Infinitives (785 candidates)
518. Subjunctive imperfect (838 candidates)
519. Preterite tense (Regular verbs) (14303 candidates)
520. Synonyms (verbs) (704 candidates)