—Here are three books on history. Which one would you like to borrow?—______. You see, I’m interested in geography these days.

–Did a letter come for me? –Yes, ____ came for you this morning.

I knocked on the door several times but _______________ answered, so I left. 

—Can I use your e-dictionary?  — Sorry. I don’t have ______.

The couple are so warm-hearted that ____ of them spares efforts to help others.