Một thửa ruộng hình chữ nhật có chu vi 1000 m chiều dài bằng 3/2 chiều rộng trên thửa ruộng đó người ta trồng lúa cứ 100 mét vuông thu hoạch được 50 kg thóc hỏi thửa ruộng đó thu hoạch được bao nhiêu tạ thóc

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Exercise 1:Viết lại câu sao cho nghĩa ko đổi 1.He started working as a bank clerk 3 months ago. =>He has................................................................ 2.Is has been 5 year since we first flew to Singapore. =>We have.............................................................. 3.I last had my hair cut in November. =>I haven't........................................................... 4.The last time we calked each other was 5 months ago =>We haven't..................................................... 5.It is a long time since we last met. =>We haven't........................................ 6.When did you have it? =>How long........................................ 7.This is the first time I had such a delicious meal. =>I haven't..................................................... 8.I haven's seen him for 8 days. =>The last.......................................... 9.To day is Saturday.I haven't taken a bath since Wednesday. =>It is............................................................. Exercise 2:Mỗi câu sau có một lỗi sai.Tìm và sửa chúng. 1.I haven't cutted my hair since last June. ....................................................................... 2.She has not working as a teacher for almosst 5 year. .......................................................................... 3.The lesson haven'e started yet. ........................................................................... 4.Has the cat eat yet? .................................................................... 5.I am worried that I hans't still ffinished my homewwork yet. ...................................................................... 6.I have just decidedto start working next week. .................................................................... 7.He has been at his computer since seven hours. ...................................................................... 8.She hasn't receivedany good news since a long time. ....................................................................... 9.Mu father hasn't playedany sport for last year. .................................................................... 10.I'd better have a shower.I hán't hadone since Thursday. .............................................................................