他的父母都出生于二十世纪七十年代 His parents were both born ___ ___ ___.
问题描述：
他的父母都出生于二十世纪七十年代 His parents were both born ___ ___ ___.
答
in the 1970‘s
答
His parents were both born _in__ _the__ _1970's__.
答
in the 1970或 in the 1970's 都可以,都表示20世纪70年代