The radiation amount of a mobile phone for two half-hour periods per day is equal to ___ to an X-ray for ten seconds.
The Olympic Games in the year 2008 ______ in Beijing of China, which ______ known to us all.
I, who ______ your close friend, will try my best to help you out of trouble.
Either you or the president _______ the prizes to these gifted winners at the meeting.
Three ______ died in the terrible fire in Luoyang last winter.
________from the top of the tower,the south foot of the mountain is a sea of trees.