Leo is my good friend. He likes tennis ping-pong.
I believe that there are many ways ________our love to our parents.
--- This math problem is _____ hard for me to understand. Can you help me ?----Sure. It’s my pleasure.
My mother often tells me______the teacher in class.
It’s always busy, so come earlier to get a table.
The expressions they use might whom they are speaking to or how well they know each other.