Although I was very tired, I didn’t sleep.No matter
Although I was very tired, I didn’t sleep. => No matter …
Although I was very tired, I didn’t sleep. => No matter …
Đáp án: No matter how tired I was, I didn't sleep.
Dịch: Mặc dù tôi rất mệt mỏi, tôi đã không ngủ. = Dù mệt mỏi đến đâu, tôi cũng không ngủ.