Shanghai celebrated____one year countdown (倒计时) to the opening of___2010 World Expo on May 1, 2009.
– It is said that Frank is very rich and is always changing his private cars .What is he? –_______ of a manager, I am not sure.
Among so many people at the party, I _______ John, one of my classmates after 20 years.
He was about to leave the office for home _______someone knocked the door and asked for some help.
There are nearly one hundred foreign students in our university, most of _______ are from America and Australia.
The climbers succeeded in climbing to the top of the mountains, and they owed their success to the preparations they ______.