HOC24
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Môn học
Chủ đề / Chương
Bài học
How did they solve the problem?
-> How ..........
she had told me the news before I asked her.
->I...........
giup mik vs
1.someone had attacked and robbed him in the street.
->he................
2. we hadn't met Tom before 2000.
->Tom.............
were the children cleaning the floor when you arrive?
->was................