The progress of technology from the past to the present is astonishing.

He was invited as a state guest of our country.

He read the notice in the park.

He notified the department head of the change immediately.

He is deeply involved in national affairs.

He is good at playing the huqin.

My dream is to live in the United States of America someday.

He was staring into the empty space.

He felt a sharp pain in his crotch.

He felt a sharp pain in his groin.