Question

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1)Operation Tiger

create left remain save

Seventy years ago there were 100,000 tigers in the world. Today there are no more than 8,000 ______ . In 1972 the World Wildlife Fund organized 'Operation Tiger' to ______ the tigers that ______ . Eighteen tiger reserves have been ______ in India and three in Nepal.

2)Greenhouse effect

Hold Atmosphere Destroy Burn Job Cans Produce Drive

The earth has been getting hotter because we are ______ too many “greenhouses gases”. These gases ______ the heat. Trees and plants help take gases such as carbon dioxide from the ______, but we have now ______ too many trees. There aren’t enough trees and plants to do this ______. We make carbon dioxide when we ______ wood or ______ cars. CFCs (other dangerous gases) are in the refrigerators and aerosol ______.

3)The Ozone Layer

Dangerous Acid Diseases Holes

There is a layer of gas called ozone. It covers the Earth. It protects us from the dangerous rays of the sun. But when ozone gets near to Earth (in ______ rain, for example) it is also very ______ itself and causes ______ . There are also now ______ in the ozone layer.

Answer 1

1)

left

save

remained

created

 

2)

produce

are holding

atmosphere

destroyed

job

burn

drive

cans

 

3)

acid

dangerous

diseases

holes