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Have you ever seen a horse with toes? Millions of years ago, horses had many toes. They had four
toes on each front foot. They had three toes on each back foot. These small horses lived in the forests.
Their toes helped them run over the soft, wet ground.
It was once very hot in the forest. But the weather changed later. It became cold. Many trees  could
not live in such cold weather, so they died and fell.  Open fields took the place of forests. The sun made
the ground dry and hard. Horses began to get bigger with climate changing. On the dry, hard land, horses
needed only their middle toes for running. Their middle toes became hard. After a long time, horses had
only one hard toe on each foot. We call it hoof.
1. Long ago, the horse had four toes on each ______.
A. front footB.back foot
C. left foot D.right foot
2. Which of the following does this story lead you to believe?
A. Animals have always been the same as they are today.
B. When the climate changes, animals begin to change，too.
C. Weather stays the same all the year round.
D. Horses are smaller nowadays.
3. What did the horse need on dry, hard land?
A. Only their middle toes for running.
B.A lot of room for running.
C. Strong legs.
D. Harder feet.
4. The main idea of the story is that______.
A. the weather never changes
B.cats were once much bigger than horses
C. horses changed very much over the years
D. the weather was once very cold
5.The word"hood"in English means"______".
A. hard leg of a horse
B. the hard foot of certain animals
C. hard toe of a horse
D. hard hand of a horse

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