Soluzione del esercizio 4 di Performer B1, Vol. 2

Esercizi svolti per il libro Performer B1, Vol. 2

Soluzione

  1. It helps control disease, gives us the things we need, provides us with natural beauty.
  2. Human activity, loss of habitat.
  3. One species every ten minutes.
  4. The Earth’s population is growing very fast, using more and more land.
  5. Mammals 25%; amphibians 41%; birds 13%; conifers 34%.