Bài tập viết lại câu thì hiện tại hoàn thành và quá khứ đơn 15. She has taught the children in this remote village for five months. She started ______________________________________________ 16. He has written to me since April. The last time ______________________________________________ 17. She hasn’t had a swim for five years. She last ______________________________________________ 18. They last talked to each other two months ago. They haven’t ______________________________________________ 19. The last time she saw her elder sister was in 1999. She hasn’t ______________________________________________ 20. She hasn’t written to me for years. It’s years ______________________________________________ 21. Robert and Catherine have been married for ten ỵears. It’s ten years ______________________________________________ 22. It’s two weeks since they deaned their room. They ______________________________________________ 23. It’s over six months since John had his hair cut. John ______________________________________________ 24. How long is it since you rode a bicyde? When ______________________________________________ 25. How long is it since he wrote to ỵou? When ______________________________________________ 26. When did he last talk to you? How long _______________________