Mang giúp mình 3 câu này vs ạ chuyển sang câu mệnh đề ạ Ví dụ như which,who,whom,that,whose.. Mình cần gấp ạ càng nhanh càng tốt

8.The bed on which I was sleeping was uncomfortable.

9.This is the time of the year when the flowers blossom.

10.The house whose entrance is in the corner was built ten years ago
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