This road has a rough surface, making it difficult to ride a bicycle.

This problem is very difficult.

I commute to school by bicycle every day.

He is touring the regions where he learns dialects by bicycle.

This road is very crowded.

I prefer coffee with a coarse grind.

Every morning, I run in the park.

He is always a person who looks for faults.

He runs in the park every day.

He raced in a marathon.