Geologists believe that this area was formed by a graben.

The treatment efficacy of this medicine is very high.

I'm always impressed by his skillful handiwork.

He values his sense of honor.

It took him time to unravel the coiled about.

He dug a hole in the ground and stored vegetables.

Let's have lunch together.

We had a delicious lunch.

I wonder what to have for lunch today.

My grandfather is seventy years old.