He decided to bet on a single win.

He finished his work in a short time.

Most of the railways in this area are single track.

I have been to the province of Batangas in the Philippines.

The central processing unit of this computer is very fast.

This speech synthesizer generates very high-quality voices.

It is reported that North Korea has conducted another underground nuclear test.

Groundwater pollution has become a serious environmental problem.

I went to the station through the underground passageway.

There are beautiful peonies blooming in my garden.