EX 1: Viết lại câu sao cho nghĩa không đổi. 10) I haven't taken a bath since 2 days ago. => It is ......................................................................................................... 11) Samuel started keeping a diary in 1997 =>Samuel has ___________________________________ 12)We started learning English fìve years ago. =>We have ___________________________________ 13) I began living in Ho Chi Minh City when I was 8. =>I have ___________________________________ 14) She has taught the children in this remote village for five months =>She started ___________________________________ 15) He has written to me since April. =>The last time __________________________________ 16) She hasn’t had a swim for five years =>She last __________________________________ 17) They last talked to each other two months ago =>They haven’t __________________________________ 18) The last time she saw her elder sister was in 1999 =>She hasn’t __________________________________ 19) She hasn’t written to me for years =>It’s years __________________________________ 20) Robert and Catherine have been married for ten years. =>It’s ten years __________________________________