根据句意和汉语注释，写出单词的正确形式。There are many kinds of different ______________(语言) in the world.
You can read these ___________(杂志) in the reading room.
Do you think these books are those ___________(青少年) over there?
Lucy can speak not only English but also ___________(法语).
My best friend Wang Lin came first in the music _________(竞赛) last week.