The modern skyscraper Aoriginated in the nineteenth century, and many Btechnolog

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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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Thetwentiethcenturysawgreatchange.Inyouropinion,whatisonechange