Ejercicio B.4 · Inglés PAU Madrid Ordinaria Martes 2022

Enunciado

B.4.- Complete the following sentences. Use the appropriate form of the word in brackets when given. (Puntuación máxima: 2 puntos)

In the 19th century, German scientist Heinrich Hertz

(prove) the existence of radio waves,

occur in nature.

Guglielmo Marconi, who was born

20th April 1874, invented what he called "the wireless telegraph" while

(experiment) in his parents' attic.

Marconi used radio waves

(transmit) Morse code and the instrument he used became

(know) as the radio.

Before the 1920s, the radio

(use) to contact ships that were out

sea.

Enunciado: Ejercicio B.4 · Inglés PAU Madrid Ordinaria Martes 2022

Según los criterios oficiales de corrección

a) In the 19th century, German scientist Heinrich Hertz _______ (prove) the existence of radio waves...

Solución: proved / proven

a) ...the existence of radio waves, _______ occur in nature.

Solución: which

b) Guglielmo Marconi, who was born _______ 20th April 1874...

Solución: on

b) ...while _______ (experiment) in his parents' attic.

Solución: experimenting

c) Marconi used radio waves _______ (transmit) Morse code...

Solución: to transmit

c) ...and the instrument he used became _______ (know) as the radio.

Solución: known

d) Before the 1920s, the radio _______ (use) to contact ships...

Solución: had been used / was used

d) ...contact ships that were out _______ sea.

Solución: at

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