1.he (decide). decided to go.. (go)..yesterday.At the moment he(prepare) was preparing...his luggage.Tomorrow he (leave) will...early in the morning

2.Nam(not buy)..hasn't bought .a new computer since he (sell).sold .the old one

3.While my sister and I (watch). was watching..a movie on T.V last night my uncle in the USA(phone).. phoned..

4.What(you/do).were you doing ..at this time yesterday?I (work). was working.. on the computer 5.The door (ring). rang..while Tom(watch). was watching..television

1.he (decide) decided (go) to go yesterday.At the moment he(prepare) is preparing his luggage.Tomorrow he (leave) is going to leave early in the morning 
2.Nam(not buy)hasn't bought a new computer since he (sell) sold the old one
3.While my sister and I (watch) were watching a movie on T.V last night my uncle in the USA(phone) phoned
4.What(you/do) were you doing at this time yesterday?I (work) was working on the computer 
5.The door (ring) rang while Tom(watch) was watching television