I have been communicating with him for a long time.

He has expertise in computer science.

He is well acquainted with Japanese.

My major is chemical engineering.

The trolleybus is very convenient as a means of urban transportation.

A bus passes in front of my house every day.

He felt that his failure was the height of extreme regret.

I travel along this route every day.

Electrons pass through the semiconductor.

The currency of Japan is the yen.