【題目】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，可知這是一個時間狀語從句。根據(jù)句意，可知選C。

句意：

你認為在電腦公司發(fā)布一種新的產(chǎn)品之前，還需要經(jīng)過多長的時間呢？

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