Listen! His family must be quarrelling, ___________ ?
The little boy showed great interest ________chemistry when he was doing it________the first time.
What surprised me was not what he said but ________he said it.
All of us like to deal with Tom—he's got a very good ________of humor.
Every year the CCTV chooses ten ________figures among the ordinary people,whose deeds can move China.
Being kind to others should be everyone's ________of behavior;________,our world will be more peaceful and beautiful.