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safety [?se?fti] n. the adjective form is safe. 安全
Be careful!
New words
They are decorating the Christmas tree.
hang [h??] v. hung-hung 悬挂
decorate [?dek?reit] v装饰
New words
ceiling [?si:l??] n.天花板
lie ?[lai] v. lay-lain 躺 说谎
She’s lying on the bed.
New words
ambulance [??mbjul?ns] n
救护车.
serious [?s??ri?s]
adj. 严肃的 严重的
Pre-reading
New words
?It is?necessary?for us to study hard
necessary ?[?nes?s?r?] adj.必需的，必要的
Pre-reading
New words
safety [?se?fti] n. 安全
careful [?kε?fl] adj. 小心的；仔细的
decorate [?dek?reit] v. 装饰
hang [h??] v. 悬挂
ceiling [?si:l??] n. 天花板
lie ?[lai] v. lay-lain 躺；说谎；谎言
serious [?s??ri?s] adj. 严重的；严肃的
ambulance [??mbjul?ns] n. 救护车
necessary ?[?nes?s?r?] adj. 必需的