Ⅲ. Language learning. Read, think and practice. 读一读，想一想，练一练。
A) 朗读并口头翻译下面句子，然后完成小结。
1. among 和 between
1) We should include milk or dairy products among the things we eat.
2) The music hall is between the teachers' building and the classroom building.
小结：among 和 between 意思相近，都表示“在……之间”的意思，但是 among 是 之间；而 between 是 之间。
2. both 和 all
Both what we eat and how we eat are important.
Not all fat makes us gain weight.
小结：both 和 all 均表示“都”。但是 both 是 “都”；而 all 是 “都”。

1) among：三者或三者以上； between：两者
2) both：两者； all：三者或三者以上

1. 第一组小结：
among：用于三者或三者以上之间。
between：用于两者之间。
2. 第二组小结：
both：表示两者“都”。
all：表示三者或三者以上“都”。