The philosopher _________ theories I am writing went insane before he died

Câu hỏi :

The philosopher _________ theories I am writing went insane before he died

A. for whom

B. with whom

C. about whose

D. in which

* Đáp án

C

* Hướng dẫn giải

Đáp án C

Lý thuyết mệnh đề quan hệ:

about whose theory I’m writing = whose theory I’m writing about

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