Make sentences according to the models of sentence structure. Model 1 ◆ It is people themselves who are the biggest cause of the destruction. ◆ It is on the weekends that I practise playing the piano. 1. the accident, the director, is responsible for 2. Jack, helped the old man to push his cart Model 2 ◆ It takes a team of men a whole day to cut down a giant tree. 1. the boy, three hours, swim across the river 2. the doctors, several hours, operate on this patient Model 3 ◆ It remains hard to beat. 1. he devoted all his time to writing fairy tales, single all his life 2. if you don’t eat, you will have to, hungry Model 4 ◆ This secondary growth, as it is called , is far less rich and varied. 1. we mentioned just now, the problem is much more serious than you thought 2. everybody knows, learning a foreign language takes much time Listening