The bad weather （ ） the building program by several weeks．

Mr. Phillips caught up with the boy in the corridor and （ ） his hand on his shoulder.

He （ ） yesterday morning, and would stay for three days.

He studies so hard to avoid （ ） at the bottom of the class.

Scientists now have some surprising answers about whether brain power（ ）as we get older.

Please remember（ ） these letters on your way to the station.

Humble （ ） it may be, there is no place like home.

The Quality Control Staff is responsible _____ the quality of the products that come out of the factory.

They overcame all the difficulties and fulfilled the plan ten days ahead of schedule, （ ） was something we had not expected.

The tribe had been living in that part of the area for generations until the civil war ______.

_____the plan carefully, he rejected it.

（ ） when she started complaining.