定语从句【一道选择题】

选 D

首先定语从句必须保证句子的完整性

无论选择A.B或者C都会使句子缺少宾语

你可以变成陈述句来看

This book is ___ I bought for you the day before yesterday.

只有用the one 才能确保句子完整以及语法正确性

如果句子如下，则可以选择A,B,C三个选项

Is this the book __ I bought for you the Day before yesterday?

原因解释同上，这个句子的结构已经完整，可以变成陈述句看，

This is the book __ I bought...

主谓宾都不缺了哈

学习加油=D

选D 转换成陈述句去理解
This book is ______ I bought for you the day before yesterday.
首先句子缺少表语，要补上the one，也就是指代the book，为了避免重复才用one的。 后面的关系代词可以用which或that，但由于关系代词在从句中充当的是宾语，所以可以省略掉
This book is the one（which/that）I bought for you the day before yesterday.

选d啊 就是the one做先行词啊 你变成陈述句就很容易理解了
this book is the one （which）I bought for you the day before yesterday 。 which做宾语可以省略

从句缺少宾语。应该在买后面添置的。所以不能省去。选B