Use of English · Parte 2
The world's oceans cover more than seventy per cent of the Earth's surface, (0) YET we know remarkably little about what lies beneath the waves. Scientists estimate that over eighty per cent of the ocean floor remains unexplored, making it one of the (1) .......... understood environments on the planet. Deep-sea…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.