(2013·北京，21)Volunteering gives you a chance ________ lives, including your own.

The farmers had the machine ________ all day and night.

We spent hours driving and another few hours waiting, only _________ that the plane would be delayed until midnight.

They say that _______ a lot of water is good for you.

The ability  _____  an idea is as important as the idea itself 

In Europe unemployment hit a new record with young people __________ it harder to get jobs．

--- What has made him upset recently?
--- __________ alone to face a troublesome case．

______ to be a football player of the school team, the boy made up his mind to train even harder.

The noise from the top floor，loud and constant，of the meeting-room_________ can be clearly heard in our classroom．

It is believed that if a book is ________，it will surely ________ the reader.