Part 1: The Island第一部：島嶼
Chapter 1: The Shell on the Beach第 1 章：海灘上的貝殼
點卡片翻面。
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- conch海螺The guide blew into a conch to call the swimmers back to shore.
- lagoon潟湖The lagoon was calm and clear because a reef blocked the big waves.
- expedition探險；遠征Our science class went on an expedition to study the river.
- uninhabited無人居住的The sailors landed on a small uninhabited island.
- elect選舉；推選Our class elected a new representative last week.