It is spring. We are born (出生) in a river. We are small and black. We look like "balls". Then we are still black. We have big heads. We have long and thin tails. We swim in the river. Now we have four legs. Our mouths are big. Our tails are getting shorter and shorter. Now it's summer. We're green. We have big eyes, but we have no tails. We're good for the crops (庄稼). Who are we? Do you know? Yes, we're frogs (青蛙).
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（1）
阅读上面短文，根据青蛙的成长顺序给图片排序。
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（2）
When are frogs born?
A . In summer.
B . In spring.
C . In winter.
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（3）
When frogs are born, they look like "____".
A . balls
B . dolls
C . toys
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（4）
Now it's summer. Frogs are ____.
A . black
B . blue
C . green
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（5）
Frogs are helpful to ____.
A . teachers
B . doctors
C . farmers
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（6）
How long does it take to grow from a tadpole (蝌蚪) to a frog?
A . About a year.
B . About a week.
C . About three months.
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