The parents can’t explain _______ makes their children so fascinated with their teacher’s lessons.

To make his fortune abroad, he ________ making the necessary preparations.

What’s the matter with you— I have a stomachache. Maybe I ate _______ last night.

_______ do you go to the library —Three times a week.

Not only the house that I live in but also all the furniture in it 　　　 to my parents not me.