The Passive ( Present Perfect and Future) Solutions Pre-Intermediate

Complete the text with the correct present perfect or future passive form of the verbs in brackets.

In 1900 there were 1.6 billion people in the world, but today that number is over 6 billion. In the last century, a lot of the world’s forests                     (destroy) to provide wood for making furniture and paper. In addition, many of the world’s seas and rivers                    (pollute).

Another problem today is how to provide food for the growing number of people in the world. New ways of growing food                (need) very soon. Some new foods                      (discover) by scientists in the last few years, and in the future we will eat more of these.

Living space will be another big problem in the future. Perhaps one day new cities                   (not build) on land any more − we will build them on or under the sea!

Complete the text with the correct present perfect or future passive form of the verbs in brackets.

Since computers were invented, they                (use) by people in many different ways. For example, computer-controlled robots                 (give) jobs in factories because they can do some things much faster and better than people. But some people are worried about this. They think that our world                    (control) by computers and robots one day.

Some robots can learn from their mistakes, and one day they may become intelligent. In the future perhaps all the important decisions              (make) by robots. And when that happens, people                    (not need) any more!

Choose the correct sentences.