b) Complete the sentences with the words from ex. 1a. There
are more words than you need.
1. Modern cities produce a lot of
2. In the future
people will build houses from
3. To fight pollution
it is necessary to invent new
materials. 4. Many
countries
using plastic because of its harmful effect on
the environment. 5. Big cities are surrounded by lots of
6. In the future,
will be controlled by computers
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