1/ Where are you going , lan ? Said hoa -> hoa asked lan where she was going.
2/ lan doesn’t have a sister -> lan wishes she had a sister
3/ where is the ticket office ? asked Ba -> ba asked where the ticket office was.
4/ he started StudyLink English four years ago -> He has studied link English for 4 years.
5/ They will finish their work tomorrow -> their work will be finished tomorrow.
6/ It’s a pity I can’t Play the piano -> I wish i could play the piano.