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cskh.tanthoishop
2 năm trước
Ở cùng một điều kiện, hỗn hợp khí nào sau đây nhẹ nhất? A. H2 và CO2. B. CO và H2. C. CH4 và N2. D. C3H8 và N2.
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Complete the passage with the correct tense of the verbs in brackets Last Sunday, students from my school (1. go) ______ on an excursion. We (2. visit) ________ Cu Chi Tunnel. We (3. come) ______ to school at 6 a.m. Ten big buses (4. take) ______us there. All of us (5. be) ______ excited, so we (6. sing) ______ all the way to Cu Chi. We (7. arrive) ________ there at 7 a.m. A tourist guide (8. show) _______ us the historical places: the long tunnel and the kitchen under the ground where people (9. cook) _____ their meals. We (10. make) _______a tour round that place. Then we (11. go)_______ to Ben Duoc Temple. We (12. see) ______lots of names of the soldiers on the walls. We (13. admire)_____ them very much. Our teacher (14. ask) _____ us to write a report. We (15. write) _____ it at the moment. We (16. feel) _____ very happy to write what we (17. 1earn) _______ from that trip. We hope we (18. come) _______ back to Cu Chi someday.

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