It was x a difficult question that they couldn't explain

Câu hỏi :

 Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

A. such

B. so

C. very

D. too

* Đáp án

* Hướng dẫn giải

Đáp án là A.

Cấu trúc: It + be+ such + N + that + S+ V…: quá… đến nỗi ....

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