题目内容
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 |
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。
考点：考查连词
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| A．because | B．so that | C．even if | D．as |
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| A．before long | B．long before |
| C．after long | D．long since |
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| A．Once | B．As long as | C．Unless | D．Now that |
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| A．when; what | B．that; when | C．that; whatever | D．when; what |
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| A．even if | B．as long as | C．even so | D．as though |
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| A．which | B．where | C．that | D．whether |
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| A．if | B．once | C．when | D．unless |
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| A．As | B．If |
| C．Although | D．Once |