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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