30.this is one ofthe best books ______ on the subject.

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30.this is one ofthe best books ______ on the subject.
A)that have everbeen written
B)which have everbeen written
C)that has everbeen written
D)whatever havebeen written

首先best 是最高级,一定是填that,所以BD排除~
接着此定语从句的先行词是the best books,是复数,因此从句谓语用的是have~
所以选择A~

30.this is one ofthe best books ______ on the subject. 定语从句This is the one of the books on the subject _____大神们帮帮忙 This is one of the best books--- This is one of the best books that ______ appeared this year This is the best book ____ on the subject 13. This is one of the best books ______ ever been written o This is one of the best books ____this year .. this book is()on the subject.A.the much best B,much the best This is the best book that there is on the subject可以解释一下这个句子 this is one of the best books that have been read this year. This is one of the best books ___. A. that have ever been wr This is one of the best films_____