Have you ever seen a horse with toes? Millions of years ago, horses had many toe

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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. The horses were smaller than cats.
These small horses lived in the forest. Their many toes helped the horses run over the soft wet ground.
It was very hot in the forest. But the weather changed. It became cold. Many trees couldn’t live in cold weather. The trees died and fell. Forests became open field. The sun made the ground dry and hard. Horses began to change too. They began to get bigger. This took a long time. On the dry hard land, horses needed only their middle toes for running. At last their middle toes became hard.
小题1:Long ago, the horse had four toes on each of its __________.

A．back feet

B．front feet

C．right feet

D．left feet

小题2:The cats were __________ the horses at that time.

A．as big as

B．smaller than

C．bigger than

D．as small as

小题3:When the weather changed, __________.

A．many trees grew well in cold weather

B．animals began to change too

C．cats were older than the horses

D．horses were the same as they are

答案

  
小题1:B
小题2:C
小题3:B

解析

试题分析：短文大意：你见过马脚趾吗？数百万年前，马有许多脚趾。他们的每只前脚有四个脚趾，他们的每只后脚各有三趾。那时的马比猫小。这些小马住在非常炎热的森林中。但天气发生变化，开始变冷。许多树死亡了。森林变成了开放的领域。太阳使地面干硬。马也开始变化了。他们开始变得越来越大。。在干硬的土地，马匹需要他们的中趾运行。最后他们的中趾变硬了。
小题1:细节理解题。根据They had four toes on each front foot.可知选B。
小题2:细节理解题。根据首段最后一句The horses were smaller than cats.可知选C。
小题3:细节理解题。根据Horses began to change too. They began to get bigger.可知随着天气的改变，动物也开始改变，所以选B。