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【题目】The hero said he didn’t think twice ____ diving into the freezing river to rescue that child.

A. before B. after C. until D. when

【答案】A

【解析】句意:这位英雄说他没有三思跳进冰冻的河里去救那个孩子not …before 为固定搭配,not...until...着重的是结果,not...before...着重的是过程,not before 不早于not until 直到……才。

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