Question

the moon...........brightly. in the sky .(shine)​

Answer 1

Answer:

the moon shines brightly in the sky

Answer 2

This blank can be filled with the word 'shines'

So, correct sentence will be:-

The moon shines brightly in the sky.

Shines is the present(V5) form of shine. This form is used when sentence is in simple past form and also if there is any universal truth.

We can detect whether the sentence is in present, past or future be looking the sentence structure.

Here universal truth is used so simple present sentence structure will be used.

Hence, simple present form of verb will be used that is shines.