So lost in their computers____that leaders at summer computer camps often have to force them to break for sports and games.

The Haiti earthquake at the beginning of 2010 is believed _______ more than 100,0130 people and makes millions homeless, ______ it perhaps the most destroying earthquake in history.

Don’t allow the Internet to control your life it is widely used in many ways.

Graduation is a good time to thank those who have helped you ______ the tough years.

This is the second time Nie Haisheng ________ to be the astronaut who took the glorious task