To drive a car safely, it is ________ good brakes.

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问题 To drive a car safely, it is ________ good brakes.

选项 A、essential with
B、essential having
C、essential to have
D、essential have

答案C

解析不定式作主语时，通常使用形式主语it;对此应特别注意，避免误用。因此C为正确答案。

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