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Lost Opportunities: Conditional III

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Complete the sentences with the correct forms of the verbs. Use Conditional III: If + Past Perfect, would + have + V3.

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Lost Opportunities: Conditional III
 

Fill in the Blanks

Lost Opportunities: Conditional IIIOnline version

Complete the sentences with the correct forms of the verbs. Use Conditional III: If + Past Perfect, would + have + V3.

by Elizaveta Gizun
1

If industries ( not / increase ) releasing greenhouse gases , the greenhouse effect ( not / start ) to build up .

2

If humans ( not / release ) fewer CFCs into the atmosphere , the ozone layer ( not / become ) depleted .

3

If humans ( not / cut down ) so many trees for fuel , they ( not / release ) so much pollution into the air .

4

If humans ( not / cut down ) so many trees , the forests ( absorb ) more carbon dioxide by now .

5

If rain and snow ( not / start ) mixing with acids , the problem of acid rain ( not / appear ) .

6

Humans ( not / make ) such a great impact on the environment if they ( not / produce ) such an amount of greenhouse gases .

7

If the world ( invest ) more in renewable energy earlier , we ( avoid ) many environmental problems .

8

If governments ( sign ) the Kyoto Protocol earlier , the emissions ( reduce ) significantly .

9

If people ( know ) about climate change in the 19th century , they ( take ) action sooner .

10

If factories ( use ) cleaner technologies , the air ( become ) much less polluted .

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