On Halloween, children in American like to _____ as ghosts to frighten people.

They often go to the restaurants for mealsThey _____ be very poor

The 16th Asian Games in Guangzhou from November 12 to November 27，2010

Scientists warn us _____ the need tokeep an eye ____ the greenhouse effect.

te the old town is the 5500 meters YulongXueshan Mountain, its peak_______ with snow.