They were swimming in the river suddenly the storm started. A. when B. while C.
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They were swimming in the river ______ suddenly the storm started.
A. when B. while C. until D. before
试题答案
A
解析:
题意:他们正在河里游泳,就在那时来了暴风雨。when 连词,意为“就在这时/ 这时”,相当于at the time when.