他们三十年代搬到了巴黎。

They moved to Paris in ___the ___thirties.

在三十年代初，美国电影业发展了。

In the beginning of ___the ___thirties, the film industry grew in the USA.

我的祖父母经常讲述三十年代的生活故事。

My grandparents often tell stories about life in ___the ___thirties.