在过去几十年里，政府采取了各种措施防止灾害发生。

在过去几十年里，政府采取了各种措施防止灾害发生。
A.In the past few decades, the government has taken various measures to prevent disasters from happening.
B.In the past few decades, the government has taken various measures to prevent disasters.
正确答案：In the past few decades, the government has taken various measures to prevent disasters.