(当前文档不提供在线查看，请下载使用！)
Lesson 1 How many birds are there
What’s this?
It’s a duck
It’s a mushroom
It’s a strawberry
What are these?
They are ducks
They are mushrooms
They are strawberries
How many dogs are there?
one
two
three
four
There are four.
How many rabbits are there?
one
two
There are two.
Ho...