---What’s the chief ______ of the world this year?---I think the Twin- Tower was destroyed.

That little boy can pick up a tune immediately on the violin; he really has a _____for music. 

I haven’t seen Sara since she was a little girl, and she has changed beyond ________.

The electric library made it impossible for teachers to have ______ to a large amount of information online．

Before the final examination, many students have shown ______of tension. Some have trouble in sleeping while others have lost their appetite.