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题库 / OG2017V-SC-225
As a result of record low temperatures, the water pipes on the third floor froze, which caused the heads of the sprinkler system to burst, which released torrents of water into offices on the second floor.
which caused the heads of the sprinkler system to burst, which released torrents of water
which caused the heads of the sprinkler system to burst and which released torrents of water
which caused the heads of the sprinkler system to burst, torrents of water were then released
causing the heads of the sprinkler system to burst, then releasing torrents of water
causing the heads of the sprinkler system to burst and release torrents of water
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pipes froze引起水管崩裂，动作引起的结果 ，需要用状语从句，排除ABC。releasing 和causing 并列表示同为froze的结果，而froze不能发出releasing。应该为the heads of the sprinkler system发出。所以，排除D。
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