1.i haven't seen her for a long time

->the last time

2."tet is the most important festival in vietnam "he said

->he

3."if you font work hard you'll fall your exam "he said

->

4.Because he got up late , he didn't go to school on time

-> if

5."it's nice of you to give a gift.thank you "she said

->

Ai biết thì giải giúp mk với, cảm ơn nhiều