New Words：

identity [aɪˈdentəti] n.身份；同一性；一致；特征
identity card 身份证

Sample Sentences：

His driver's license revealed his identity.
A credit card is not a valid proof of identity.
The police asked him to show his identity card.

license ['laisns] n.许可证, 执照, 特许
reveal [ri'vi:l] vt.显示, 透露, 揭示, 展现
credit ['kredit] n.信用
valid ['vælid] adj.有效的, 有根据的, 合法的, 正当的
proof [pru:f] n.证明, 证据

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