Use of English · Parte 2
Some of the most impressive structures in the world are bridges. Bridges (0) HAVE to be built to withstand a variety of forces. These forces come (1) .......... a combination of factors: the weight of the bridge, the weight of the traffic, and the strains exerted by the weather, such as wind, rain and snow. Bridges…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.