その洞穴はとても暗かったので、彼らは手探りで進まねばならなかった。の英語

The cave was so dark that they had to feel their way.

Was the cave found by the boys?

they built a fire at the mouth of the cave

No one could find the cave.

The cave is easy of access.

The cave is easy to access.

It was so dark that they could hardly see.

There were traces of someone living in the cave.

Their dog was so fierce that he kept everyone away.

drilling there would be strictly a wildcat operation

I felt like sinking into the floor

I was ready to sink into the ground.

Their dog was so fierce that he kept everyone away.

Their dog was so fierce that he kept away every one.

hollow out as if making a cave or opening

The cave was searched.

They're digging a hole.

I've botched things up so bad I wish I could find a hole to climb into.

I wished the ground would open up and swallow me.

I wished I could sink through the floor.

Because the surroundings were so dark, he could not see anything.

That hole is definitely deep.

I went to Myeongdong this year too.

The huge crater told of the violence of the bomb blast.

It was intended as a stopgap.

The water there was so deep that I could not touch bottom.

getting through that small opening was a tight squeeze

The fog was so thick that I had to drive very slowly.

The cave is full of fireflies.

I went into the cave―entered the cavern.