Some countries are increasing their use of natural gas, and other forms of ______. 

.How many foreign friends does he have? ___.

Mary is fond of the dress in the store, but it is too expensive, so she won’t take it without a _____.

Although dishonesty seems so common in recent years, people still believe that honesty will not go out of       ．

I keep medicines on the top shelf, out of the children’s       .