根据短文内容，用方框中所给的单词的正确形式填空，使短文通顺、完整。

    In1997, Bobbi McCaughey gave birth to seven babies. They all survived(存活). This autumn, McCaughey's children are preparing to have ____18th birthday.

    Eighteen years ago, the birth of McCaughey's seven children was huge news across the world. Bill Clinton, American President at that time,____ the family and congratulated them. Doctors worried that they wouldn't survive their first few days, but they did. Many people helped them and they grew up____.

   "Somany things have happened in 18 years. All the happiness and ____are special to us,"said Mum Bobbi McCaughey. Now her children are____to graduate from high school.

在△ABC中，DE∥BC，AE：EC=2：3，DE=4，则BC等于（　　）