More than 36 million Chinese children are receiving piano training, but quite a few have little ______ in the piano and some even hate it. 

When he heard a cry for help, he ran out as          as he could.

________ dog is ________ useful animal and ________ honest friend as well.

All of us have gone out. There is ________ at home.

— Dave is always making the same mistake. It worries me a lot. — Take it easy.           , he is only a child.