those boys helped one another in their studies
问题描述:
those boys helped one another in their studies
A each other B one another C one and another D each and other
请问为什么呢
这四个都是互相的意思 可是有什么不同呢
答
each other 指两者之间;而本题的主语是those boys,指三者或三者以上用的是one another.