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giangtrungquan01
2 năm trước
Nguyên tử M có hai đồng vị . Đồng vị 1 có tổng số hạt là 92 số hạt không mang điện nhiều hơn mạng điện âm là 24 Tìm tên M
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1 . Điền vào chỗ trống với “ FOR “ hoặc “ SINCE “ 1.George has been a teacher ……………… six years 2.John and Mary have been married ………… they finished university 3. My father has workerd in that factory …………….. 1990 4. My parents have had their house …………… they moved to London 5. We have had this parrot only …………. three weeks 6. Rachel has been in France…………….. she found a job in Paris 7. Steven has played in our school team ……………. three years 8. He has been miserable ………….. he lost his wife 9. I haven’t seen Meg ……………. Ages 10. He has collected 2500 stamps …………… he was a little boy 11. David has driven his car …………. seven years 12. I haven’t met my high school friends …………… I became a doctor 13. Anny and Fanny haven’t eaten chips ……………. they went on a diet 14. She hasn’t been able to walk …………. she had a car accident 15. I haven’t read any books …………… July . 2. ĐIỀN VÀO CHỖ TRỐNG VỚI “ FOR “ HOẶC “ AGO “ 1. We came to this town six months ……………. 2. Chiris has spoken Chinese …………….. twelve years 3. My grandfather has been retired …………. only four months 4. Our Maths teacher bought a big house three days …………… 5. James has been a dentist ………… about twenty – three years 6. I haven’t brushed my teeth …………. Three days 7. I finished cleaning my room half an hour ……………. 8.Steven has played in a basketball team …………… four years 9. My aunt moved to Essex two weeks ……………… 10. Jackie has played the violin ………………. Ten years 3. Chia động từ ở thì QUÁ KHỨ ĐƠN 1. Yesterday, I ( go ) to the restaurant with a client

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