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直訳で申し訳ないのですが、私も作ってみました。あくまで試訳です。
My birth year [= The year I was born] is two years before the World War II broke out.
The Tale of Genji has been read in many countries since it was translated [= was put] into English in 1920's.
Two people who seemed [=appeared] to be a married couple in their late 60's got on the bus.
The recent typhoon has severely damaged about [= approximately] three-fifths of the apple crops (grown) in this region
[=in this area / in this part of the country]. <-- 能動態でもいいかと...
Since the late 1980's(,) more and more young people [an increasing number of young people] have been losing interest in science and technology.
ご参考までに...
間違っていたらごめんなさいね。
ありがとうございます😭
教養がある英語話者であれば、第二次世界大戦を World War II もしくは the Second World War と言います。the World War II とは言わないです。