阅读下面的短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。
How long does it take to build a new house? It usually takes about six months or more. each year, thousands of people work together to build new homes in just four months! Who does this (wonderful) work? Habitat for Humanity.
Habitat for Humanity is a group that builds homes for （family) in need. It has branches(分部) in different states around the country.
This group works all over the world, too. Volunteers help build the homes. They are unpaid workers who do all the work for (free). Volunteers can be builders and painters. They can be teachers or bankers. Some are students. Habitat for Humanity has built more than 300,000 houses. More than 1.5 million people (live)in these houses.
Building a home is hard work. Volunteers learn to put up walls. They use many (machine)and tools. These selfless(无私的) volunteers work with the family that will live in the house. Everyone (work) together to make the family's dreams come true.
Suruchi Srikanth has worked with Habitat for Humanity for four years. She (begin) volunteering in high school. She has built many homes with other volunteers. She takes her responsibilities(责任) seriously. Volunteers know they don't help, homes may not get built. They are good citizens who care about other people.
