He was surprised to receive an unexpected phone call.

He suddenly made an unexpected phone call to my house.

This smartphone has a power-saving mode.

I am waiting for the tram at the tram stop.

I called him and confirmed the details of tomorrow's meeting.

I called him and confirmed the details of tomorrow's meeting.

Could you tell me your phone number?

The electric power company is increasing its purchase of electricity from solar power generation.

The electric power company is buying electricity from the solar power plant.

We are selling the electricity generated from solar power to the electric power company.