----Do you have any idea why Mark is leaving?---- No. In fact, everyone is ________about it．

Tom is a promising student. I am sure that with his________effort, he will make a very successful scientist.

Jane is          high school student in the United States.

The most important thing is to keep _____ when you get into difficulties. 

The dress is really fashionable and eye-catching, but it is          too big for me.