Test # 43
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1450 questions in 145 tests. Each test contains 10 questions.
Idiom of the Day
a rule of thumb
a basic or accepted pattern or rule
It is a rule of thumb in the fire department that nobody goes into a burning building by themselves.
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Myth About Animal
Rhino horns are not made of bone but of keratin
Rhino horns are made of Keratin, the same material found in your hair and fingernailsA rhinos horn is not attached to its skull It is actually a compacted mass of hairs that continues to grow throughout the animals lifetime, just like our own hair and nails.