He hesitated for a moment before kicking the ball, otherwise he ___________ a goal.
Tsinghua University, ______ in 1911, is home to a great number of outstanding figures.
__________ you know, this is the day the quake happened
I hate ______ when the weather becomes freezing cold because there is no heater inside.
Rather than _______ on a crowded bus, he always prefers ______ a bike.
________ I came, the city wasn’t so beautiful.