New Words：
horn [hɔːrn] 喇叭;角质;(羊、牛等动物的)角;(乐器)号;（车辆的）喇叭
Sample Sentences：
He sounded the car horn.
Toot your horn to let them know we're here.
There is little or no traffic and no car horns sounding.
toot [tuːt] v. (使汽车喇叭)发出短促尖锐的声音，发出嘟嘟声
New Words：
creep [kriːp] v. 爬行；悄悄地缓慢行进；蹑手蹑脚地移动
crept [krept] creep的过去分词和过去式
Sample Sentences：
They began to creep up to the zebra.
She crept downstairs quiet as a mouse.
He crept into the house trying not to make a sound.
I crept up the stairs, trying not to wake my parents.
New Words：
herd [hɜːrd] n.牧群；兽群；人群
a herd of 一群（牛、鹿等）
Sample Sentences：
Zebra like to live in herds.
There was a herd of cows in the field
They chased a herd of wild horses on the savanna.
New Words：
savanna [səˈvænə] n. 热带大草原；稀树草原
grassland [ˈɡrɑːslænd] n. 草原;草地;草场
Sample Sentences：
The grassland smelt fresh and sweet after rain.
These pictures tell what the grasslands are like.
More than half of the world's savanna area is in Africa.
The savanna is also the home of meat-eaters--the lion, leopard who feed on the grasseaters.
New Words：
sniff [snɪf]
n.闻；嗅；抽鼻子
v.闻；嗅；抽鼻子
Sample Sentences：
She took a deep sniff of the books.
He lifted his nose and sniffed.
The dog stopped and sniffed at my shoes.
We all had colds and couldn't stop sniffing.
When Floopy meets another dog, they sniff each other for a while.