1.Anna was reading a piece of science fiction, completely ___ to the outside world.

2.The problem of ___ to select as his successor was quickly disposed of.

3.The first people to live in ___ Hawaii were by Polynesians, who sailed here in large canoesfrom other Pacific islands about 2,000 years ago.

4.Hovercraft, or air-cushion vehicles, are unusual ___ travel over land and water on a layer of air.

5.Before starting on a see voyage, prudent navigators learn the see charts, ___ and memorize lighthouse locations to prepare themselves for any conditions they might encounter.

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