Perhaps Asurprisingly the Bmain obstacles to Crealize this dream Dis neither technical nor commercial.

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问题 Perhaps Asurprisingly the Bmain obstacles to Crealize this dream Dis neither technical nor commercial.

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答案D错,应该改为“are”。

解析 本句的主语“obstacles”是一个复数,“is”作主语为单数时句子的谓语,所以在这里主谓不一致,应该把“is”改为“are”。
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