영어1 천재 강상구 4과 본문 빈칸

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

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

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

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

Welcome to the show, Mr. ____.

Thanks for ____ me, Jo.

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

Well, most birds migrate ____ dark, including almost all 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 at ____ because the night sky is cooler, and the air calmer.

Besides, there are ____ predators at night.

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

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

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

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

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

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

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

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

This is ____ it works.

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

Isn’t it ____?

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

Who wouldn’t like to have such an ____?

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

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

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

They just eat and eat ____ they double their weight.

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

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

____ what happens after they arrive there?

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

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

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

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

Why do you come here so ____?

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

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

While these enormous stretches of ____ 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 ____ kilometers to get to the Yellow Sea.

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

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

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

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

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

Well, ____ can 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 or monitoring ____ habitats.

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

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

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

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