They are sure that they can make ______ possible for their model cars to run without electricity.
.. ___ by the advances in technology, many farmers have set up wind farms on their land.
.It is none of your business ___ other people think about you. Believe yourself.
.I like getting up very early in summer. The morning air is so good ___ .
.___ is known to us all is that the 2010 World Expo will take place in Shanghai.
.We decided to turn to ___ can help us out.