As young adults, it is our_____ to try our best to deal with each challenge in our education with the help of our teacher. 

To my great ______ , he finished the work only in a few days.

 – What do you know about _______?-- Line drawings that show how something works.

— When will the London 2012 Olympic Games start?— It will start on July 27th. You can visit London this ________.

The customers are pleased with the________of the restaurant.