1 八上阅20 Have you ever seen a horse with toes (脚趾)? 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. But toes helped them run over the soft, wet ground. It was once very hot in the forests. But the weather changed later. It became cold. Many trees could not live in such weather, so they died and fell down. Open fields took the place of forests. The sun made the ground dry and hard. Horses began to get bigger with climate (气候) 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”. l. Long ago, the horse had four toes on each ________. A. front foot B. back foot C. left foot D. right foot 2. What did the horse need on the dry, hard land? __________. A. Only their middle toe for running B. A lot of room for running C. Strong legs D. Harder feet 3. 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 4. The word "hoof" 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 阅21 根据短文内容判断所给句子的正误，正确的写“T”，错误的写“F”。 Bob and Jim once worked in the same factory. One day, Bob lent Jim ten dollars, but then Jim left his work and went to work in another town without giving back the money. Bob didn't see Jim for a year. And at that time he knew from another friend ...
