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hangphuc19012017
1 năm trước
cho tam giác ABC vuông tại A lấy điểm O bất kì trên BC . I là hình chiếu của O trên AB. CMR OI/AC=OB/BC ( CM theo điện tích tam giác)
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Exercise 6: Put the verbs in brackets in past perfect or past simple. 1. When she (finish) …………… her work, she (go) ………… to the cinema. 2. He (not eat) …………….. until his parents (come) ………….. home. 3. She (tell) ……………… me she never (meet) …………………….. him. 4. He (do) ……………. her homework before he (go) ……………….. out. 5. The lights (go) ………..out the moment he (get) ……………..into the cinema. 6. Hardly the holiday (begin) …….. when they (leave) ……………. the town. 7. They (be) ……………..out for an hour when it (start) …………….. to rain. 8. They (leave) ……………… the shop as soon as they (buy) …………………….. everything they (need) …………………….. 9. The house (burn) ….. to the ground buy the time the firemen (arrive) … 10. As he (do) ………….. a lot of work that day he (be) ………….. very tired. 11. I already (hear) ……… about the accident when he (tell) ….. me about it. 12. He (live) …………….. in the country for ten years when he first (come) .. to London. 13. I (not talk)……….. to him because when I (arrive) ……………..he already (leave) ………………… 14. When we (go) ………….. out again, the wind (stop) …………………….. 15. He (think) ……….…. he (win) ……….…..in the lottery but he (not have) ………..……. of course.

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