C1 Advanced · Reading & Use of English · Parte 3

Práctica de C1 Word Formation (Gratis)

Amplía tu dominio de las familias de palabras. Decide qué forma expresa el significado buscado, incluidas las formas negativas y plurales fáciles de pasar por alto.

Prueba el ejercicio gratuito Crear cuenta para practicar más

Este ejercicio, sus explicaciones y el PDF descargable están en inglés.

Descargar ejercicio y explicaciones (PDF)
Descarga gratuita · No necesitas una cuenta · 3 páginas

Testing the air around us

Use the word in capitals beside each gap to form one word that fits the passage. Consider the part of speech and whether the meaning needs a negative prefix.

Material didáctico original e independiente. No necesitas cuenta. El resultado cuenta las respuestas correctas de esta muestra, no puntos de examen.

A neighbourhood group bought inexpensive sensors to measure local air pollution. Before publishing the results, they asked a university to check the equipment's Hueco 1RELY. The first readings were Hueco 2CONSIST: two sensors placed beside each other reported sharply different figures. A direct Hueco 3COMPARE with a laboratory instrument confirmed that one sensor needed adjusting.

The researchers explained that a single reading was Hueco 4LIKELY to provide a useful picture of conditions over a whole month. Instead, they recommended a Hueco 5SYSTEM approach, with measurements taken at regular intervals in the same locations. They also warned against confusing a small numerical difference with a change of practical Hueco 6SIGNIFY.

The group welcomed this advice. Full Hueco 7DISCLOSE of the method would allow other residents to understand how the figures had been collected. Although some early results remained Hueco 8CONCLUDE, the project had already taught its volunteers something valuable: collecting data was only the beginning of a careful investigation, not a substitute for one.

No necesitas una cuenta. Puedes comprobar tus respuestas tantas veces como quieras.

Respuestas y explicaciones

Lee el motivo de cada respuesta, vuelve al texto y encuentra las pistas por tu cuenta.

Pregunta 1: Mostrar respuesta y explicación

Respuesta: reliability

RELY → reliability. “Check the equipment's reliability” needs a noun after the possessive. Reliability is its ability to give trustworthy results; reliable is an adjective and cannot fill that noun position. The family changes rely to reliable, then reliability: notice the -i- and the ending -ability.

Pregunta 2: Mostrar respuesta y explicación

Respuesta: inconsistent

CONSIST → inconsistent. “The first readings were inconsistent” needs an adjective describing the readings. “Sharply different figures” from neighbouring sensors shows disagreement, so the negative prefix in- is essential. Consistency is a noun; consistent would contradict the evidence.

Pregunta 3: Mostrar respuesta y explicación

Respuesta: comparison

COMPARE → comparison. “A direct comparison with a laboratory instrument” requires a singular countable noun after a direct. Comparison names the act of checking the two instruments against each other. Comparative is normally an adjective here and would leave the noun missing; comparing does not fit a direct ... with in this sentence.

Pregunta 4: Mostrar respuesta y explicación

Respuesta: unlikely

LIKELY → unlikely. “A single reading was unlikely to provide a useful picture ... over a whole month.” The recommendation for repeated measurements establishes the negative meaning. Add un- to likely; likelihood would require a different structure. Unlikely to + verb means not expected to happen.

Pregunta 5: Mostrar respuesta y explicación

Respuesta: systematic

SYSTEM → systematic. “A systematic approach” needs an adjective before the noun. “At regular intervals in the same locations” describes an organised method. Systemic means affecting an entire system and does not describe the step-by-step measurement procedure intended here.

Pregunta 6: Mostrar respuesta y explicación

Respuesta: significance

SIGNIFY → significance. “A change of practical significance” requires a noun after the adjective practical. Significance means importance: the researchers distinguish a measurable difference from one that matters. Significant is an adjective and would need to modify a noun rather than follow practical in this phrase.

Pregunta 7: Mostrar respuesta y explicación

Respuesta: disclosure

DISCLOSE → disclosure. “Full disclosure of the method would allow...” uses a noun phrase as the sentence's subject. Disclosure means making the procedure available for inspection. Disclosed is a participle and cannot be the head noun after full. Notice the ending -sure rather than an invented -ment form.

Pregunta 8: Mostrar respuesta y explicación

Respuesta: inconclusive

CONCLUDE → inconclusive. “Some early results remained inconclusive” needs an adjective after remained. Although introduces a contrast: results did not settle the scientific question, but volunteers learned something. Conclusive would reverse that meaning; conclusion is a noun. Form conclusive, then add in-.

¿Quieres más práctica de C1 word formation ?

Crea una cuenta gratuita para practicar más y guardar tu progreso. Esta muestra y sus explicaciones seguirán siendo gratuitas.

Crear cuenta gratis

¿Ya tienes cuenta? Iniciar sesión para esta actividad.

Los ejercicios se generan con IA y pueden contener errores. Son práctica complementaria, no materiales oficiales de examen.