2. 职称英语
  3. The______of the steam engine occurred before the development of the railroad.A、i

The______of the steam engine occurred before the development of the railroad.A、i

游客2025-02-04  12
问题 The______of the steam engine occurred before the development of the railroad.
选项 A、invent
B、inventive
C、inventor
D、invention
答案 D
解析 A noun must follow the. The noun invention is the subject of the sentence.
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