题目内容

【题目】How long do you think it will be ________ the computer company brings out a new product?

A．untilB．whenC．beforeD．that

【答案】C

【解析】分析句子，可知这是一个时间状语从句。根据句意，可知选C。

句意：

你认为在电脑公司发布一种新的产品之前，还需要经过多长的时间呢？

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