—I regret ________ you that your application has not been successful.
—Not successful? I performed pretty well in my interview!

English teachers are supposed ________ their students a test in class, even after class, ________ better teaching results.

Similarly, active places exist around the globe, with some even ________ a new kind of tourists.

Life is like riding a bicycle. ________ your balance, you must keep moving.

After walking on the zigzag path to the mountain top for a few hours, the tourists gathered under trees ________ shade and ________ down to have a rest.

Sitting at the corner of the meeting room, he looked sad because there were so many problems ________.

Your cousin is said ________ a new computer program recently, but do you know when he will finish it?

________ the opportunity to speak at the graduation ceremony made him overjoyed.

 (2012·洛阳高二检测) _______ of danger in the street at night, she had to go home with a friend _______ her.

____ to teaching, as we know, contributes to his popularity with his students.