Trắc nghiệm Chuyên đề 5: Writing có đáp án (Phần 2)

It is a medieval palace. The king hid in its tower during the civil war. →

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It is a medieval palace. The king hid in its tower during the civil war.

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Giải thích

It is a medieval palace, in whose tower the king hid during the civil war. / ..., whose tower the king hid in during the civil war.