People often laugh when they see penguins walking. Penguins look very funnywadd

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问题 People often laugh when they see penguins walking. Penguins look very funny
waddle from side to side on their short little legs. However, Adelie penguins 【M1】______
can walk 200 kilometers across the Antarctic sea ice to the place they lay 【M2】______
their eggs.
Penguins are such good swimmers so early explorers thought they were 【M3】______
fish. They use their flippers ’fly’ through the water as other birds use their 【M4】______
wings to fly through the air. Emperor penguins, the big penguins, 【M5】______
can go as fast as 50 kilometers an hour. If Adelie penguin is swimming 【M6】______
quickly, it can jump 2 meters out of the water. They do this before they are 【M7】______
being chased by leopard seals, which like to eat them.
Emperor penguins can hold its breath underwater for twenty minutes. 【M8】______
This means they can dive very deep to hunt for food. The deepest dive scientists
know about is 458 meters. That’s nearly half a kilometer!
When the male emperor penguins are looking after eggs, they join
together in tightly groups. In the middle of the group it might be 38℃ , 【M9】______
while on the outside of the group it might be -35℃. When the penguins 【M10】______
on the outside get too cold, they move slowly to the inside and others take
their place on the outside. [br] 【M10】

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