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We were swimming in the lake suddenly the storm started. [ ] A. when B. while C.

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We were swimming in the lake suddenly the storm started. [ ] A. when B. while C.

We were swimming in the lake ________ suddenly the storm started.

[]A.

when

B.

while

C.

until

D.

before

试题答案

答案:A

解析:

题意为:我们正在游泳,突然,下起了大暴雨。可以看出,这里需要的是表示“突然”的连词,表示在一个动作进行当中突然出现了别的意料之外的动作或行为,只有when有这个用法,因此答案是A项。while表示两个动作同时发生,且有对比的含义;until指动作持续到另外一个动作发生即停止;before强调在一个动作发生之前有什么动作,常译成“才……”,比如:I swam for an hour before it began to rain.我游了一个小时天才开始下雨。