数字词汇，你懂吗？

香港刚刚在7月1日庆祝了回归25周年，是一个很有历史纪念价值的日子，而笔者的文章也不知不觉地在《香港教育杂志》刊登至第61期，真是非常荣幸！读者或知道25周年的别称就是「银禧纪念」，英语为Silver Anniversary or Silver Jubilee，其实其他周年纪念或时间英语，也拥有不同称号，今期让我跟大家介绍一下。多学几个，将来买礼物或写心意卡时可大派用场！

英语喜欢利用个别独立字汇表达数字的意思，考考大家能否真正了解以下句子的含义！！！

1. Mum bought a dozen of eggs in the supermarket.
2. David spent the last fortnight in Malaysia.
3. The oil price has risen steadily during the past decade.
4. A century ago, Hong Kong was a fishing village.
5. My brother’s room is thrice the size of mine.
6. How did you celebrate the millennium?
7. A quarter of the residents in the city are over 50 years old.
8. We hope our business can grow faster in the new biennium.