We could have walked to the station. It was so near. A taxi______at all necessar

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问题 We could have walked to the station. It was so near. A taxi______at all necessary.

选项 A、wasn’t
B、hadn’t been
C、couldn’t be
D、wouldn’t be

答案 A

解析这个句子是虚拟语气与直陈式语气的结合，使用过去时态。

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