I him yesterday, but he could not help us.
. My parents told me to look forward ___ road signs while walking on the street.
. . ___ 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.