Use of English · Parte 3
For most of human history, the stars above were so vivid that the great (0) OBSERVATORIES (OBSERVE) of antiquity could be established almost anywhere. That era is drawing decisively to a close. Artificial light (1) .......... (POLLUTE) now reaches across continents, and for the majority of people alive today the…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.