题目内容
We had hardly arrived at the foot of the Yuntai Mountain it began to rain heavily .
| A．than | B．when | C．until | D．after |
B
解析试题分析：句意：我们差不多到达云台山脚下了，突然天开始下起了大雨。此处when意为：突然。故选B。
考点：考查状语从句的连接词。
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