Air, _ __we breathe every day, is around us all the time.
Mr. Black was old, but able to _______quickly to changes in technology.
When I met Becky, she told me that she ______ for an interview the next day.
Many high school students wish that they ______ at a top university in the future.
When I was in primary school, I was told that the earth ______around the sun.
The professor spoke so fast during the lecture that we couldn’t _____ what he said.