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

North Korea is a country located in East Asia.

He made a delicious dinner to repay my kindness.

This festival is held every year.

He solved the problem again.

He went to that store again.

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

In physics, the study of the 'nucleus' at the center of an atom is important.

We conducted a new experiment in science class.

We will conduct a new chemistry experiment tomorrow.