老师，你好！请教一道关于介词 in / of 使用的题目：
Welcome to our store. We have handbags _____ different shapes _____ different colours.
A.in; in B. in; of C. of; of D. of; in
答案是B。为何是选B ? 其他的3个选项为何不能？ 想了解具体详细是什么原因，麻烦老师详细剖析，谢谢！
我不了解这道题的出处是不是权威，换句话说，它是不是出得严谨。仅就本题而言，我感觉答案并不唯一。
Welcome to our store. We have handbags _____ different shapes _____ different colours.
▲第一，这道题要排除 A 和 C。由于，这两个选项在两个空填的是同一个介词，若是如此的话，就应在中间加上并列连词，即：
Welcome to our store. We have handbags in different shapes and in different colours.
Welcome to our store. We have handbags of different shapes and of different colours.
并且，若是如此的话，最好省略后面一个重复的介词，即最好说成：
Welcome to our store. We have handbags in different shapes and different colours.
Welcome to our store. We have handbags of different shapes and different colours.
▲除去A和C外，B和D都可以选择：
Welcome to our store. We have handbags in different shapes of different colours.
Welcome to our store. We have handbags of different shapes in different colours.
即表示“不一样的形状”和“不一样的颜色”，其前用介词 in 和 of 都可以，其细微不同是：用in，表示“以……的形式”；用 of，表示“……的”。两种搭配都可以在词典上查到有关例子：
socks of different colours 不同颜色的袜子
an array of bottles of different shapes and sizes 各式各样大小不一的瓶子
It consists of metal or plastic pieces in different shapes and sizes. 它由各种形状和大小的金属或塑料块组成。
The lupin is a plant with tall flowers in different colours. 羽扇豆是一种有不同颜色的高花的植物。
▲但假如不是用于名词后定语，而是用作状语（表示方法），则只可以用in。如：
A colour monitor shows things in different colours. 彩色显示屏显示不一样的颜色。
Few people realise that ladybirds come in different colours. 大家不知，瓢虫有不一样的颜色。
