It’s high time we (take) ______proper measures to clean our air.took本题考查虚拟语气的用法。

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问题 It’s high time we (take) ______proper measures to clean our air.

选项

答案 took

解析本题考查虚拟语气的用法。在it is high time后的从句中，谓语动词要用过去时。

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