영어1 천재 강상구 4과 본문 빈칸

____ listeners. Did you know there are times at night when a massive migration happens right over your heads?

The scale of migration involving ____ of birds traveling up to thousands of kilometers leaves you in awe.

On today’s Jo’s Tea Time , ____ invite naturalist and author Scott Weidensaul to share his knowledge.

He’s spent decades studying migratory ____ writing about them, and engaging in conservation efforts.

Welcome ____ the show, Mr. Weidensaul.

Thanks for having me, ____

Your new book ____ every spring and fall, hundreds of millions to billions of migratory birds pass over our roofs, but we seem to have no idea that it’s happening. Why is that?

Well, most birds migrate after dark, including almost ____ of the birds that are normally active during the day.

That’s why it’s hard for us to ____ the migration is happening.

They migrate ____ night because the night sky is cooler, and the air calmer.

Besides, there are fewer predators at ____

If you could strip away the night sky and ____ everything visible, this migration would probably be the largest, greatest natural spectacle on the planet.

Among those global travelers in your ____ I found the bartailed godwits to be particularly impressive.

Sure. Some of them can even make a 10,000 km nonstop journey ____ the Pacific Ocean, from western Alaska to New Zealand in 11 days.

How do they travel such a ____ distance over a nearly featureless ocean?

To find their routes, the bar-tailed ____ probably rely on the sun and stars among other things.

Some experts believe that they may ____ able to sense the earth’s magnetic field lines, too.

You may also wonder how, if ever, they sleep while flying over ____ vast ocean.

It turns out ____ migratory birds use an approach called “half-brain sleep.”

This is how it ____

Only the left half of the brain sleeps for a couple of seconds, then only the right half for the next couple of seconds, and then this process ____ over and over again.

Isn’t it ____

Actually, some sea mammals like ____ can do that, too, because they have to keep breathing consciously.

Who wouldn’t ____ to have such an ability?

Birds in migratory condition can ____ things that they can’t do at other times of the year.

Another neat trick ____ might envy is that they can gain a tremendous amount of muscle tissue without exercise.

For example, before some bar-tailed godwits leave ____ in September and make a 10,000 km flight across the Pacific, they undergo a process of binge feeding.

They just eat and eat until ____ double their weight.

By the time they take off, ____ heart and flight muscles may have increased by 50%.

After they have eaten as much as they possibly ____ and can’t put any more weight on, their digestive organs shrink dramatically because these won’t be put to use during the non-stop flight to New Zealand.

Then what happens after ____ arrive there?

They regrow their digestive organs ____ spend the summer feeding again, and they undergo the same journey back to Alaska.

They do this again and again for 25 to 30 years, flying up to 30,000 km every ____

By the time bar-tailed godwits die, they have ____ close to twice the distance from Earth to the moon.

That’s truly impressive. By the way, I hear you’ve visited ____ several times before.

Why do you ____ here so often?

As a bird watcher and conservationist, I find the Yellow Sea mudflats between ____ and China very special.

They are some of ____ largest tidal mudflats on the earth and provide a critical stopover point for the countless migratory birds on the East Asian-Australasian Flyway.

While these ____ stretches of tidal mud look featureless to the human eye, they have plenty of marine life forms.

So the mudflats are drawing all kinds of birds in from as far away as New Zealand, Australia, and ____

Yes. Many of these birds fly several thousand kilometers to ____ to the Yellow Sea.

Here, they have to double their weight in less ____ two weeks and make another flight of several thousand kilometers up north.

That’s ____ the Yellow Sea is so critically important.

It’s one of the few places in the world where migratory birds can get the resources ____ need on their difficult journey.

Oh, I had no idea that the Yellow ____ has such importance.

What do you think we can do to preserve this precious gathering place for ____ birds?

Well, you ____ start by raising awareness of its importance among people around you.

Or, if you want to be more actively involved, you can participate in cleaning up beaches ____ monitoring wildlife habitats.

On a bigger scale, because migratory birds travel through many ____ international cooperation is a must for their protection.

Actually, I’m working with an international organization consisting of the countries along the East Asian-Australasian ____

As ____ result of our international collaboration, we managed to successfully bring back the endangered blackfaced spoonbills.

Fascinating! Mr. ____ today you let us see migratory birds and the Yellow Sea in a whole new way. Thank you!