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How long ______ interested in environmental issues? It seems that you have done your research.

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This charity provides support ______ underprivileged people.

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Many people who ______ think that they are very fortunate to live the way they do and want to give something back to society.

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Volunteer work helps young people know their strong and weak points before they enter the ______.

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Their children ______ lots of new friends since they ______ to that town.

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Pioneers in science are often the ones who ______ other people to study and develop their discoveries.

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Building necessary ______ such as hospitals, schools and parks is important.

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It’s 10 o’clock in the morning. Sarah ______ in her room. She ______ her homework.