Exercise 9. Viết lại câu sao cho nghĩa không đổi. 1.The last time she came back to her hometown was 4 years ago. Shehasn't............................................................................................................................... 2.He started working as a bank clerk 3 months ago. He has................................................................................................................................... 3.It has been 5 years since we first flew to Singapore. We have................................................................................................................................. 4.I last had my hair cut in November. I haven't.................................................................................................................................. 5.The last time we called each other was 5 months ago. We haven't............................................................................................................................. 6.It has been a long time since we last met. We haven't.............................................................................................................................. 7.When did you have it? How long..............................................................................................................................? 8.This is the first time I had such a delicious meal. I have never........................................................................................................................... 9.I haven't seen him for 8 days. The last................................................................................................................................... 10.Today is Saturday. I haven't taken a bath since Wednesday. It..............................................................................................................................................