The doorbell had been ringing for several minutes before it .
A answered B had answered C was answering D was answered
The doorbell had been ringing for several minutes before it . A answered B had answered C
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解决时间 2021-12-23 10:57
- 提问者网友：遮云壑
- 2021-12-22 16:52
最佳答案
- 五星知识达人网友：荒野風
- 2021-12-22 17:38
解析：这里动词answer是及物动词，所以要用被动语态。
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- 1楼网友：神也偏爱
- 2021-12-22 17:56
好好学习下
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