17. The last time I wrote to him was 3 months ago

 I haven’t written to him for 3 month

18. The last time she went to Malaysia was in 1999

 She hasn’t gone to Malaysia since 1999

19. The last time she came back home was yesterday

 She hasn’t come back home since yesterday

20. The last time Susan visited Malaysia was twelve years ago

 Susan hasn’t visited Malaysia for 12 years

21 I have not  smoked since June.

 The last time I smoked was in June

22. She has not seen him since last Sunday.

 The last time she saw him was last Sunday

23. They haven’t used the phone since yesterday. 

The last time they used the phone was yesterday

24. He hasn’t come back to the village when they left school.

The last time he  came back to the village was  when they left school.

25.We haven’t met him since 2015.

 The last time we met him was in 2015

17. The last time I wrote to him was 3 months ago.

 I haven’t written to him for 3 month.

18. The last time she went to Malaysia was in 1999.

 She hasn’t gone to Malaysia since 1999.

19. The last time she came back home was yesterday.

 She hasn’t come back home since yesterday.

20. The last time Susan visited Malaysia was twelve years ago.

 Susan hasn’t visited Malaysia for 12 years.

21 I have not  smoked since June.

 The last time I smoked was in June.

22. She has not seen him since last Sunday.

 The last time she saw him was last Sunday.

23. They haven’t used the phone since yesterday. 

The last time they used the phone was yesterday.

24. He hasn’t come back to the village when they left school.

The last time he  came back to the village was  when they left school.

25.We haven’t met him since 2015.

 The last time we met him was in 2015.

chúc bạn học tốt