2013-2014年高考英语卷写作表达题目范文汇总(31):助人为乐

学术词汇需要继续积累，单词拼写不错；如若适当增加一些从句的使用，文章会取得更好的成绩；全文结构较为严谨。

So why would an orphaned elephant, like Chastity, attach herself to an unrelated, relatively unfamiliar family? "It wasn't clear," says Wittemyer. One possible explanation is that there were two female elephants similar in age to Chastity in the new family. Conceivably she saw them as potential allies. Chastity gave birth to her own calf 6 months later Alternatively, it could be because the matriarch had just given birth. It's not unusual for juvenile female African elephants to be fascinated with newborn calves, says Wittemyer. In line with this idea, Chastity soon began pitching in, helping out her foster family by caring for the matriarch's baby, even suckling the calf. Such babysitting, technically called alloparenting, is quite common in young female elephants. It's unclear whether the calf gets any milk. The young female may just provide a living pacifier or dummy. At any rate, the behaviour "calms the newborn down," says Wittemyer. In this case, Chastity gave birth to her own calf 6 months later, so she was pregnant at the time and may have already been producing milk, says Wittemyer.