If he ______ at home, he ______ sorry.[ ]

Some little boys have difficulty ______their hearts into the lesson for a long time.

My little brother can play ____ soccer and I can play ____ piano.

I looked for the key ______ the door, but I didn’t find it.[ ]

It’s hard to _________ a girl with only one arm can play ping-pong so well. — Yes, she is great.