It was several minutes _______ we realized what was happening~our dog was trappe
题型：不详难度：来源：
It was several minutes _______ we realized what was happening~our dog was trapped in a newly-dug tunnel.| A．since | B．before | C．until | D．while |
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答案
| B |
解析
试题分析：句意：过了几分钟我们才意识到发生了什么—我们的狗被新挖的隧道困住了。这里使用了句型：It was+一段时间+before…，“要多久…才/就…”,所以选B。 |
举一反三
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