Model de resposta (uns 175 mots):
It is often claimed that a wide vocabulary is more valuable than perfect grammar, and I largely agree, although not without reservations.
To begin with, communication rarely breaks down because of a missing article or a wrong tense. Listeners can usually reconstruct the meaning of an ungrammatical sentence, whereas an unknown word leaves them with nothing to work with. Anyone who has travelled abroad knows that a handful of well-chosen nouns will take you further than flawless but empty sentences. Moreover, vocabulary grows naturally through reading and listening, and it enables learners to express increasingly sophisticated ideas.
Nevertheless, accuracy cannot be dismissed. In academic or professional contexts, persistent mistakes may create an impression of carelessness and undermine the writer's credibility. Likewise, understanding how prefixes and suffixes work allows learners to guess unfamiliar words, so both skills are interdependent. Classroom time should therefore be shared between them, with a clear emphasis on words.
In conclusion, vocabulary should come first, since it is the foundation of understanding, but learners who neglect grammar will find their progress unsatisfactory in the long run.
Claus de correcció: (1) tesi clara i matisada; (2) estructura en introducció, dos arguments, contraargument i conclusió; (3) almenys sis derivats ben formats i connectors variats.