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maingochoangle
2 năm trước
một nguyên tử r có tổng số hạt là 115 số hạt mang điện tích nhiều hơn số hạt ko mang điện tích là 25 hạt tính nguyên tử khối của r
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11. "What time ___________ for work every morning?" "At 6:30." A. have you left B. had you left C. do you leave D. did you leave 12. I wasn't thirsty because I ________ some milk. A. drunk B. have just drunk C. just drank D. had just drunk 13. Who ________________ the car at time of the accident? A. was driving B. is driving C. drove D. has driven 14. After having a bath, he ________ his supper. A. had eaten B. ate C. has eaten D. was eating 15. The phone ________ suddenly when Joanne was doing the housework. A. rang B. ringing C. has rung D. is ringing 16. It ________ as we drove slowly along the road. A. has snowed B. had snowed C. was snowing D. is snowing 17. He couldn’t remember what ___________________ to him the day before. A. happened B. was happening C. has happened D. had happened 18. You can't meet the director now. He __________ with someone. A. talks B. was talking C. is talking D. talked 19. My sister ________ married in January, 2002. A. has got B. got C. was getting D. had got 20. Anita _________ very hard at the moment. A. is studying B. studies C. studied D. has studied

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