You need to use your head to solve this problem.

They (referring to women or girls) are my best friends.

He is a very excellent technician.

The advancement of science and technology has greatly changed our lives.

He is good at solving technical problems.

Information technology plays a very important role in modern society.

I have been to Hawaii.

This woven cloth has a very beautiful pattern.

In old Japan, kombu was called 'Hirofu'.

We have launched a major campaign for the announcement of the new product.