1) Sometime in the future, buildings ____________________ green walls and roof gardens to help retain carbon dioxide a) will have b) will be having c) will have had 2) By the end of this century, half of the Amazon rainforest _______________ . a) Will deforestate b) will be deforestating c) will have been deforestated 3) In 50 years, the world population ___________________ 9 billion. a) will reach b) will be reaching c) will have reached 4) In the future, most of the population ________________ in cities a) will live b) will be living c) will have lived 5) Soon, computers _________________ more intelligent than humans a) will become b) will be becoming c) will have become 6) In less than 20 years, scientists ___________________ a cure for cancer. But we ________________ from new deseases. a) will discover/ will suffer b) will have discovered/ will have suffered c) will be discovering / will be suffering d) will have discovered /will be suffering

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