tests by hidalgo with the online test builder (688 tests)

481. Prepositions (2832 candidates)
482. Present (20499 candidates)
483. Spelling changes (1954 candidates)
484. Road signs (4876 candidates)
485. Imperative (906 candidates)
486. Subjunctive present (1449 candidates)
487. Gender (2093 candidates)
488. Prepositions (1942 candidates)
489. Imperative: negation (4470 candidates)
490. Correct tense (2491 candidates)
491. Correct verb (2739 candidates)
492. Quantities (3178 candidates)
493. Question words (15580 candidates)
494. Imperative (4222 candidates)
495. Nouns from verbs (751 candidates)
496. Opposite words (11772 candidates)
497. Futur (2636 candidates)
498. Definite articles used as pronouns (6066 candidates)
499. Imperative: affirmation & negation (5561 candidates)
500. Ser/Estar (5276 candidates)