New Words：

choice [tʃɔɪs] n. 选择;挑选;抉择
stone [stoʊn] n. 石头; 石料; 岩石; 石块; 石子

Sample Sentences：

He had no choice but to leave.
This colour wasn't my first choice.
How much time do I have to make a choice?

Most of the houses are built of stone.
Some children were throwing stones into the lake.

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