My job is to help those who are junior ______me in my class.
There was a sudden burst of light ______ a terrible noise.
Every time he had a chance,he would talk about the great difficulty he had _____ in the new country.
There is nothing more I can try _______you to stay, so I wish you good luch.
______ by a greater demand of vegetables, farmers have built more green houses.
The crowd cheered wildly at the sight of liu xiang, who was reported _______ the world record in the 110-meter hurdle race.