The poor boy was late for class yesterday, _________was unusual for him.

Câu hỏi :

The poor boy was late for class yesterday, _________was unusual for him.

A. that

B. when

C. which

D. what

* Đáp án

C

* Hướng dẫn giải

Đại từ quan hệ "which" thay thế cho cả mệnh đề đứng trước đó: The poor boy was late for class yesterday

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