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

501. Ser/Estar (5468 candidates)
502. Prepositions (1499 candidates)
503. Preterite tense (Pretérito indefinido) (9056 candidates)
504. Expressions with TENER (1017 candidates)
505. Conjunctions Y(E), O (U) (4194 candidates)
506. Prepositions (2019 candidates)
507. Clothes (1653 candidates)
508. Por qué, por que, porque, porqué (1505 candidates)
509. Infinitive or "que + subjunctive" in a subordinate (2667 candidates)
510. Prepositions (1415 candidates)
511. Personal pronouns (841 candidates)
512. Gender of nouns (894 candidates)
513. Antonyms (1472 candidates)
514. Present => Past and vice versa (945 candidates)
515. Imperative mood (affirmative and negative commands) (859 candidates)
516. Infinitives (773 candidates)
517. Subjunctive imperfect (789 candidates)
518. Preterite tense (Regular verbs) (11399 candidates)
519. Synonyms (verbs) (696 candidates)
520. Where, who, when, how, why ...? (1189 candidates)