英语三级B级
填空题It's high time we (take) ________ proper measures to clean our air.
参考答案：暂无进入在线模考
本题答案：took。句意：现在确实到采取恰当的措施来清洁我们的空气了。本题考查的是虚拟语气。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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