At 2004 Athens Olympic Games, Liu Xiang excited people all over Asia when he became the first Asian _______ the gold medal in the men’s 110-meter hurdles.
It is time for class. Will you please get the blackboard__________?
This is the biggest lab__________we have ever built in our university.
He is__________as a leader but he hasn’t__________in teaching.
Only by practising constantly__________ greater progress.
__________ printed, this science fiction will be popular among the students.