Course book: Unit10

10:
   1. c
   2. b
   3. a

13:
    By the year 2050 pollution levels in cities will have decreased because scientists will have invented  environmentally – friendly cars. However, there will be no more rainforests as we will cut them all down. Furthermore, people will live in cities under the sea since normal cities will have become too crowded. On the other side, people will live longer as scientists will have cure for many diseases. In addition, we will go on holiday to other planets because space travel will have improved. What is more, we will do more creative jobs because computers will have done the most boring jobs. But there will be more poor people as there will have been fewer jobs. Moreover, crime will have increased as more people without work.