Don’t turn off the computer before closing all programs，________ you could have problems.                                                         

On the annual International Volunteers Day, the world ______ the work of millions of people who give their time to help others．

After a year's training, I'm sure he will _______ the target.

 (2012·武汉高二检测) As a teacher rich in experience, he knows how to _______ his ideas to these new students in a limited period of time.

The production of the factory has grown to _____ in 1999.