根据句意，选择恰当的词填入句中。
at  long   watermelon  short  night  moon  sun
1.In summer, it's hot. I like to drink ________ juice.   
2.At ________, the ________ is high in the sky. It's big and bright.   
3.The shadow is ________ in the morning but it is ________ at noon.   
4.The ________ rises in the morning. It goes down in the evening.   
5.________ night, the stars are high in the sky. They are beautiful.