懂你英语level4 unit2 part4 Dictation.

Alcatraz was used as a prison for 29 years. During that time, no prisoner escaped successfully. There were 14 escape attempts involving 36 prisoners. 23 were caught alive and six were shot and killed.

People see things from different points of view. This often leads to arguments between people. Here are some examples. From this man's point of view. He is relaxing. He needs to relax because he has been working too hard.

Scientists estimate that there have been at least five mass extinction in the last 540 million years. They also believe that we have entered a new extinction event instead of asteroids or volcanic eruptions, the current event is the result of human activities. Human activities, for example, have LED to global warming.