十三 营员们学唱了歌曲 Sing a Rainbow,让我们一起继续为这首歌填词！
Sing a Rainbow
Red and yellow and pink and green.
Purple and orange and blue.
I can sing a rainbow, sing a rainbow,
sing a rainbow too.
Listen with yourars.
What can you hear?
I can .
What colour is the sky?
The sky is .
What's your favourite colour?
My .

sing a rainbow；blue；favourite colour is red（答案不唯一，合理即可）

本题是沪教版三年级英语的填词题，结合所学歌曲《Sing a Rainbow》及基础常识作答：第一空对应问题“What can you hear?”填歌曲相关内容；第二空根据常识填天空的颜色；第三空填个人喜欢的颜色相关内容，符合三年级英语词汇要求。