Use of English · Parte 2
How much sleep (0) DO we really need? This can vary quite a lot between individuals. However, it is widely believed that between 6-8 hours (1) .......... healthy. What is particularly important is that this sleep happens at the right time; that it fits in with our body's natural rhythm. If you suffer from sleepiness…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.