Railways are ______ to the economic prosperity of the country.A、essentialB、usef

游客2025-04-04 0

问题 Railways are ______ to the economic prosperity of the country.

选项 A、essential
B、useful
C、reliable
D、preferable

答案 A

解析 essential(to)a.(定语或表语)必要的，必不可少的，非常重要的。

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