作业帮It's about half a century ago ( ) people's Republic of China was liberated .
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It's about half a century ago ( ) people's Republic of China was liberated .
It's about half a century ago ( ) people's Republic of China was liberated .
It's about half a century ago ( ) people's Republic of China was liberated .
since 自从
强调句型：
It's about half a century ago ( that) people's Republic of China was liberated.
常规句式：
The People's Republic of China was liberated about half a century ago.