(２)Doraemon is loved in everyone.
(４)These books was written by Mr.Mori.
合ってる自信はありませんが…！
はい！すいませんでした。
あと、in everyone じゃなくて by everyoneです。
誰にでも間違いはありますから。仕方ないですよ！(笑)
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was じゃなくて were ですよ。
複数ですから。