. The jug ____ easily．Be careful when you handle it．

Since then the number of people taking driving lessons ________ 20％. 

—Have you heard from Nelly recently?— Yes, I _________ his letters and cards many times while I was in Italy.

Rainforests _______ and burned at such a speed that they will disappear from the earth in the      near future.

The young boy has come to himself in hospital now. But he ___ unconscious for three days.