2. 外语
  3. The modern skyscraper Aoriginated in the nineteenth century, and many Btechnological improvements Ccontributed to its Ddevelop.

The modern skyscraper Aoriginated in the nineteenth century, and many Btechnological improvements Ccontributed to its Ddevelop.

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问题 The modern skyscraper Aoriginated in the nineteenth century, and many Btechnological improvements Ccontributed to its Ddevelop.
选项 A、 
B、 
C、 
D、 
答案D
解析 Develop is a verb. A noun is needed after the possessive adjective its. Correction: development.
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