Who ... (go/gymnastics club)? 4) Who ... (show/the video)? Where ... (Penelope/go)?
5) Why ... (they/be happy)?
What song ... (teenagers/sing)? 6) Why ... (the song/be popular)?
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Who going to go gymnastics club. (go/gymnastics club)? 4) Who showing the video (show/the video)?

Where Penelope going to go?(Penelope/go)?

5) Why they are happy (they/be happy. What teenagers song singing (teenagers/sing)? 6) Why the song is popular (the song/be popular)?