That accident was caused by his lack of attention.

His actions led to the problem.

Please check the date.

He often behaves in a foolish manner.

I was surprised by his stupidity.

He has experienced a life of hardship and wandering.

He returned from a long journey and was exhausted and wandering aimlessly.

The mesosphere is a part of the Earth's atmosphere, located between the stratosphere and the thermosphere.

He likes to write novels.

He was involved in anti-Japanese activities.