He replied to my letter very （快速地）．
She is so （幸运的） to take a photo with her favorite singer．
This activity showed us the （重要性） of protecting our environment．
无论你遇到什么困难，你都应尽全力克服．
problems you meet， you should make an to deal with them．
坦诚地说，中国在许多国际事务中起着越来越重要的作用．
To be ， China is playing a more and more important in many international affairs．