Thebookisthebest________hasever

发布时间：2020-07-10 18:07:13

The book is the best ________ has ever been written on the subject.













A.which












B.that











C.what











D.both A and B

网友回答

B解析句子省略 one，应为“The book is the best (one) …”先行词被最高级修饰，关系代词不能用“which”。
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