假如你的朋友李雷昨天下午在操场上打篮球，被鞋绊倒，左腿受伤而不能行走，你们带他上了医院。医生说，需要住院一星期。请你以李雷的身份，用英语书面向张老师请假一周。
参考单词：doctor, trip, break, shoes, hospital, basketball, playground, move, take…to…
要求词数：50~70
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Which animal do we need _ _76 _, dogs, horses, pigs? No! The __77__ to the question is cows. Why cows? Cows give us milk. And milk is one of 78 most important _ _79 _ of food.
Suppose(假设)that all the milk cows make in one year were put _ 80 __ bottles. And suppose these bottles were put side by side. The line of bottles would go all around the world 400 _ 81 __. That is a lot of milk, less than half of which is used for _ 82_ and cooking. Most of it is used to make butter, cheese, ice cream and many other things. It takes many cows to give us that _83 __ milk. But not as many as it used to, a cow used to give only about 1500 quarts(夸脱)of milk a year. Now a fine cow may_ 84 _more than 3000 quarts in a year.
Why 85 cows give more today? Now farmers have better cows. The cows get better care and better food.