Fill in the blank with an appropriate option.

It was past the mid-hour of the night, and was quite ______ and dark. 

The correct answer is 'Option 1' i.e. 'Moonless'.

Key Points

• The correct word to fill in the blank is "moonless."
• Moonless: This adjective is used to describe a night where the moon is not visible.
• It is often associated with darkness.
• This is the correct answer because it fits the context and provides a logical reason for the night being very dark.

Therefore, the correct sentence is: It was past the mid-hour of the night, and was quite moonless and dark. 

Additional Information

• Glimmer: This is a faint or unsteady light, or a hint of something. It doesn't make sense to describe a night as "glimmer," because this term doesn't describe the overall lighting condition of the night.
• Flasher: This generally refers to a device that produces a flashing light or signal, and it doesn't fit grammatically or contextually in this sentence.
• Riding: This is a verb usually associated with mounting or being on top of something (like a horse, a bike, etc.) and moving along with it. It does not fit grammatically or contextually in this sentence.