La respuesta correcta se apoya en el texto; no necesita conocimientos externos.
Conecta las piezas: si A y B son ciertos, ¿qué debe ser probable?
Estrategia paso a paso
Resume la lógica del texto en una cadena corta: causa → efecto → conclusión.
Descarta opciones que contradicen algún dato del texto.
Trampas habituales
Conclusiones razonables en la vida real pero que el texto no apoya.
Opciones que repiten el punto de vista contrario al que pide el texto.
Ejemplo resuelto
Una planta solo florece bien si el invierno es frío. Este invierno fue muy suave → lo lógico es que florezca poco esta primavera.
Preguntas de ejemplo
Intenta responder antes de abrir la solución. Las preguntas están en el idioma del examen.
Pregunta 1
Dificultad fácil≈ 1 min
Snow leopards, which live in the cold, high mountains of Central Asia, have unusually long, thick tails that can be nearly as long as their bodies. Researchers have often observed snow leopards wrapping their tails around their faces and paws while resting in freezing winds. This observation suggests that the tails ______
Which choice most logically completes the text?
AA. help the animals stay warm in cold weather.
BB. are used mainly to signal to other snow leopards.
CC. make it harder for the animals to climb slopes.
DD. grow longer during the winter than in summer.
Ver respuesta y explicación
Respuesta correcta: A. help the animals stay warm in cold weather.
Explicación
The leopards wrap their thick tails around their faces and paws while resting in freezing winds—exactly what an animal would do to keep warm. The observation suggests the tails help them stay warm.
The observation involves resting animals, not signaling or climbing, and the text says nothing about tails changing length with the seasons.
Pregunta 2
Dificultad media≈ 1 min
Many of the oldest buildings in Venice rest on millions of wooden piles—tree trunks driven deep into the mud beneath the city’s lagoon. Wood usually rots when fungi and bacteria break it down, and these organisms need oxygen to survive. The thick mud beneath the lagoon, however, contains almost no oxygen. This may explain why ______
Which choice most logically completes the text?
AA. the builders of Venice preferred wood to stone for walls and floors.
BB. many of the piles have lasted for centuries without rotting away.
CC. fungi and bacteria are especially common in the waters of the lagoon.
DD. the mud beneath the lagoon has slowly become firmer over time.
Ver respuesta y explicación
Respuesta correcta: B. many of the piles have lasted for centuries without rotting away.
Explicación
Rot requires organisms that need oxygen, and the mud around the piles has almost none. That would allow the buried wood to survive for a very long time without decaying.
The text concerns piles beneath the buildings, not walls and floors, suggests the mud is a poor home for decay organisms rather than a rich one, and says nothing about the mud changing.
Pregunta 3
Dificultad difícil≈ 2 min
An online store tested a new website design by showing it to every visitor who arrived on a weekday, while visitors who arrived on weekends saw the old design. Purchases per visitor were higher with the new design. However, the store’s records from previous months show that weekday visitors have always made more purchases per visitor than weekend visitors have. Therefore, the results of the test ______
Which choice most logically completes the text?
AA. prove that the new design caused visitors to buy more products.
BB. do not clearly show that the new design itself increased purchases.
CC. suggest that weekend visitors prefer the old design to the new one.
DD. show that the store should stop selling products on weekends.
Ver respuesta y explicación
Respuesta correcta: B. do not clearly show that the new design itself increased purchases.
Explicación
Weekday visitors always buy more than weekend visitors, and in the test only weekday visitors saw the new design. The higher purchases could simply reflect the day of the week, so the test does not clearly show that the design made the difference.
For the same reason, the test cannot prove the design caused the increase. Weekend visitors never saw the new design, so their preferences between designs are unknown, and nothing supports closing on weekends.