1. When did you first know Sir?
=> How ...
2. Since the invention of computer, people have saved a lot of time.
=> Since the computer was ...
3. He was very sorry that he didn’t see her on his trip to London.
=>
He greatly regretted....
Giúp mình vs, mình tick cho
=) đang cần kiểm tra lại bài làm của mình
1. When did you first know Sir?
=> How long have you known Sir?
2. Since the invention of computer, people have saved a lot of time.
=> Since the computer was invented, people have saved a lot of time.
3. He was very sorry that he didn’t see her on his trip to London.
=> He greatly regretted not seeing her on his trip to London.
Học tốt! Check kĩ vào nhá^^
mk check câu 3 thôi nha vì 2 câu đầu bạn@Shen làm đúng rồi mà
3:==>He greatly regretted not having seen her on his trip to Lon Don.
