1.I have never met him before
-> It........................................
2.I have never eaten this kind of food before
-> It is........................................................
3.I've never seen this film before
-> This............................................
4.We've never drunk this kind of water before
->This is.................................................
5.He's never been to HCM city before
->It is....................................
6.It is the first time I've seen this man
->I've ......................................
7.This is the first time he phoned me
->He has...........................................
8.This is the first time I've talked to her
->I've..................................................
9.This is the first time Nam has used computer
->Nam has.......................................
10.It is the first time Tom has sung
->Tom has................................................
11.Ba had never listened to classical music before
->This was.................................................
12.Nam had never seen him before
->It was.............................................
13.I had never seen him before
->It was..................................................
14.It was the first time Ba had killed chickens
->Ba had.....................................................
15.It was the first time she had eaten apple
->She had....................................................
16.He last saw me a week ago
->He hasn't......................................
->It is..................................................
17.Ba stopped playing soccer when he was 30
->Ba hasn't..................................................
18.Hung began listening to music at 8 o'clock
->Hung has.........................................
19.He didn't smoke two years ago
->He hasn't.............................................
->It is..............................................
