Fill in the ______ first and then wait for the interview in the next room.

The____of the Itaipu Dam took 30 000 people seven years.

I haven’t seen Sara since she was a little girl, and she has changed beyond ________.

 I want to learn more about the American political system, but I don't know where to get the ________ . 

The article gives several ______ about why we should build up the harmonious society.