题目内容
40.突然发生了地震，但幸运的是，村民们被带到了一个安全的地方。
The earthquake happened _ _ _ _，but luckily the
villagers were brought to a safe place.
40. all of a sudden
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题目内容
40.突然发生了地震，但幸运的是，村民们被带到了一个安全的地方。
The earthquake happened _ _ _ _，but luckily the
villagers were brought to a safe place.
40. all of a sudden