My uncle is John Smith. We can call（称呼）him _______.

Many countries are using natural gas , wind and other forms of ________ .

---Are your grandparents in good _____?  ---Yes. Because they have quite _____ living habits.

Jane likes to give her students a lot of _______ on how to improve their English. 

“Wechat”(微信)really makes a great _____to people’s life. It’s easier for us to keep in touch with others.