一、还原课文
Pigeon surprise
Day 1
We're studying birds for Bird Week at school. Some lucky kids got 1. (penguin). But I have to write about... pigeons!
Day 2
I 2. (watch) pigeons in the park now. They just knock around—for the whole morning! They leave droppings here and there. Pigeons are BORING and DIRTY!
A girl 3. (feed) them. Argh! The birds are flying 4. (mad) to her. They're SCARY!
Day 3
I'm doing some online research. Pigeons can recognise 5. (they) in mirrors. How surprising! Are they so clever? I'd better go and 6. (watch) them again...
Day 4
I'm back at the park again. Oh! That pigeon 7. (look) at itself in the water! Maybe I was wrong about pigeons.
Day 5
I 8. (read) in the library now. Oh, there are over 200 kinds of pigeons. Some can fly several thousand kilometres and don't get 9. (lose). They can also fly at speeds of over 100 km per hour. That's as fast as my dad's car!
Well, pigeons aren't boring or scary. They are 10. (amaze)—I just didn't know enough about them!

1. penguins
2. am watching
3. is feeding
4. madly
5. themselves
6. watch
7. is looking
8. am reading
9. lost
10. amazing/AMAZING

1. They just knock around—for the whole morning! 它们只是到处闲逛——整整一上午！
点拨 knock around 意为“闲逛；无所事事地消磨时间”，句中的just和破折号后的时间状语for the whole morning(整整一上午)强调了其无所事事的程度。
▷迁移
(1) On rainy days, he usually just (knock around) at home.
(2) We spent the holiday (knock around) the old town.

(1) knocks around
(2) knocking around