The Earth's surface has numerous testimonies to extraterrestrial bodies hitting its surface. They are called impact craters, The Earth Impact Database contains a list of 190 impact craters. One of them is the Zhamanshin crater in Irgiz, Kazakhstan. About one million years ago, a gigantic meteorite exploded here and formed a crater700 m deep and 14 km wide.
The energy released by the explosion was equivalent to tens of thousands of megaton bombs, and temperatures in the region reached several thousand degrees centigrade. Zhamanshin meteor crater is a unique phenomenon among
impact craters because of the tektites, or irgizites, which have
been found here.

Ex 3 Read the text again and correct the mistakes in the sentences below, so that the sentences are true about the text.

• 1 There is very little evidence that extraterrestrial bodies hit the Earth.

· 2 The number of impact craters in the special Database is two hundred.

• 3 Zhamanshin is a crater created by small meteorite.

. 4 The crater has the depth of 14 km.

1) You must not speak loudly at the lesson. - Ты не должен громко разговаривать на уроке.2) You must not run round the desks during the break. - Ты не должен бегать вокруг парт во время перемены.3) You must not be late at your lessons. - Ты не должен опаздывать на уроки.4) You must not drink cold water. - Ты не должен пить холодную воду.5) You must not go out without warm clothes in winter. - Ты не должен выходить на улицу без теплой одежды зимой.6) You must not speak to a stranger. - Ты не должен разговаривать с незнакомцем.7) You must not орen the door for people you don't know. - Ты не должен открывать двери людям, которых ты не знаешь.8) You must not cross the street when the red traffic light is. - Ты не должен переходить улицу на красный свет.9) You must not speak rudely to anybody. - Ты не должен разговаривать грубо с кем бы то ни было.10) You must not come to school without your school uniform. - Ты не д

1) You must not speak loudly at the lesson. - Ты не должен громко разговаривать на уроке.2) You must not run round the desks during the break. - Ты не должен бегать вокруг парт во время перемены.3) You must not be late at your lessons. - Ты не должен опаздывать на уроки.4) You must not drink cold water. - Ты не должен пить холодную воду.5) You must not go out without warm clothes in winter. - Ты не должен выходить на улицу без теплой одежды зимой.6) You must not speak to a stranger. - Ты не должен разговаривать с незнакомцем.7) You must not орen the door for people you don't know. - Ты не должен открывать двери людям, которых ты не знаешь.8) You must not cross the street when the red traffic light is. - Ты не должен переходить улицу на красный свет.9) You must not speak rudely to anybody. - Ты не должен разговаривать грубо с кем бы то ни было.10) You must not come to school without your school uniform. - Ты не д