Crocodiles are dangerous ____.
A researcher is a person who ____.
A peacock is famous for its ____ feathers.
One ____ equals 1,000 kilograms.
A kangaroo usually carries its baby in its ____.
A predator hunts and eats its ____.
At present, many animals are in danger of ____.
A butterfly is a type of ____.
A quart and a gallon are units of ____.
If something is exotic, it is usually ____.
In winter, water can _______ ice.
Scientists try to protect the _______ of rare species.
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