Choose the correct answer that best completes each sentence.

1. As he was running for a charity which was ... to his heart, he felt even more determined to complete the race.

2. Living ... had improved dramatically since their last visit to the village.

3. The group decided that the most effective way to ... awareness of the issue was to get on television.

4. These temples were built by the Aztecs and date ... to the 1400s.

5. On completing her fifth Atlantic race, she decided to ... herself a new challenge.