题型：语法填空（语篇） 题类：模拟题 难易度：困难
广西2018届高三下学期英语考前4月模拟联合试卷
Each zebra has its own unique pattern of distinctive stripes (带), just humans have their own unique pattern of fingerprints, Zebras stick together in herds (兽群). Within a herd, zebras tend (stay) together in smaller family groups. Families are generally made up of a male, several femalestheir young.
As zebras graze, they use their sharper front teeth to bite the grass, and then use their duller back teeth to crush and grind. A zebra's teeth keep growing for (it) entire life, because constant chewing(wear) them down.
Zebras are (constant) on the move to find fresh grass and water. Sometimes they gather in huge herds of thousands as they migrate to better feeding (area). They often travel in (mix) herds with other grazers and browsers, such as wildebeest.
Zebras groom (理毛) one another, If you see two zebras standing close each other and it looks like they're biting each other, don't worry. They're pulling loose hairs off each other as they groom. Grooming also feels good to a zebra—it's like having an itch scratched,
While most zebras are least endangered, Grevy's Zebra (classify) as endangered.
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