Đáp án:
Exercise 1:
`1`/ We have begun eating since it rained.
`2`/ I haven't had my hair cut since I left her.
`3`/ We haven't met for a long time.
`4`/ How long have you had it?
`5`/ The last times I seen him was 8 days ago.
`7`/ They asked me which color I liked.
`8`/ Long said that she was his wife.
`9`/ He asked me If I went to school the next Saturday.
