Use of English · Parte 3
The race to reach Mars has become a truly (0) INTERNATIONAL (NATION) effort, with several space agencies and private companies competing to lead the next stage of (1) .......... (EXPLORE). Sending people to another planet is an extraordinarily (2) .......... (AMBITION) goal that would have seemed pure science fiction…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.