Zhengnengliang, or positive energy, _______a term used in the book Positive Energy by Richard Wiseman, has developed into a popular phrase in Chinese society where people approach life with optimism and confidence.

My grandfather spends most of his time _______ because he loves nature. 

 -Tom, why didn't you go to the flower show? -I think it's something _______ pleasant. 

So hard did he work that he __________made himself ill for a whole week. 

“John” and“Tom” are _______ names in the English-speaking countries.