people have always been curious ______ how living things on the earth exactly began

My sister is always telling us of the people and the things ____ interest her.

Please give Jim the schedule for tomorrow’sconference when he _______ back. He is to chairthe conference.

They often use wood as fuel to ________ coal.

I dislike shopping online. I prefer to see the real thing and touch it before I pay for it., especially for clothes.— You’re right. _______.