求作业答案：He _____ a worker in
求作业答案：He _____ a worker in
| He _____ a worker in a factory, but he _____ a pop star two years ago. | [ ] |
| A. used to be… has become B. used to be… became C. was used to be…becomes D. was used to being… has become |
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你能帮帮他们吗