Use of English · Parte 2
There are many different kinds of birds (0) WHICH successfully share our cities with us, but (1) .......... of the most intelligent are crows. This bird has been carefully tested by scientists in (2) .......... manner of ways, and the results are clear for everyone to see. Even their success in (3) .......... they…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.