공통영어1 천재 조수경 4과 변형문제

When you go deep into the sea, you can see a variety ____ marine animals including corals.

Over the course of many ____ corals build up to form large structures called coral reefs.

Brightly colored coral reefs provide ____ beautiful underwater landscape.

However, this is not the only reason they ____ valuable.

Coral reefs are crucial ecosystems that ____ both marine life and people living near the sea.

Coral reefs provide shelter to an abundance of marine life, such ____ fish and underwater plants.

Because of the diversity of life found in coral reefs, they are often called “the rainforests of the ____

Nearly one quarter of all ____ marine species depend on coral reefs for survival — they hide themselves from predators, find food, reproduce, and raise their young in coral reefs.

As far as humans are ____ over half a billion people rely on coral reefs for safety and survival.

____ large waves generated by storms rush toward shore, coral reefs serve as natural barriers.

The ____ of the waves is reduced as they hit the coral reefs.

Consequently, they prevent the ____ on the shore from washing away and thus protect towns near the sea.

Moreover, reefs are a source of medicine, and many organisms found in coral reefs are used to treat diseases ____ cancer.

This is why they are sometimes referred ____ as the “medicine chests of the sea.

These underwater treasures are under threat of ____

The more coral reefs become damaged, the more creatures relying ____ them will lose their homes.

Thus, the increasing ____ of coral reefs might lead to the destruction of the entire marine ecosystem.

The U.N. reported that many of the ____ coral reefs are currently endangered.

In fact, nearly half of Australia’s Great Barrier Reef, the world’s largest, has ____

If swift action is not taken, scientists estimate that most coral reefs will be ____ by 2050.

There are various causes, like destructive fishing techniques, overpopulation of corals’ ____ enemies, and careless tourism.

However, ____ leading cause is the rise in water temperature due to global warming.

The ideal ____ range for corals to live is 20°C to 28°C.

When the water ____ rises above 30°C, coral reefs turn white and eventually die.

Another serious cause is ____ waste.

Plastic ____ such as bottles and fishing lines, have been dumped into the sea.

This spreads viruses and diseases, ____ coral reefs and their inhabitants.

In recent years, advanced technologies have been put in place to save coral reefs ____ monitoring, protecting, and restoring them in quick and efficient ways.

Researchers from Florida introduced a soft jellyfish-like robot to monitor coral reefs without damaging their delicate ____

In addition, an Australian research team invented an intelligent underwater robot to protect coral reefs from a ____ species of starfish.

The robot uses a camera and computerized vision system to scan the reefs and ____ this starfish.

When it encounters one, the ____ uses a foldable arm to inject some toxic salt into the starfish and eliminate it.

Meanwhile, 3D ____ systems have been proposed in Hong Kong as one way to restore coral reef structures.

The 3D ____ creates artificial support for corals.

An example is a block made of mud ____ lies on the floor of the ocean.

____ is shaped in a way that allows corals to attach to it and grow easily.

____ are some simple but effective steps we can take in order to help protect coral reefs.

First, you can avoid ____ beauty products containing tiny pieces of plastic because they pollute the oceans.

Also, ____ not to use sunscreen made with certain chemicals that damage corals.

Second, you can volunteer to help ____ the beach.

Recycling and reducing trash is a huge help in ____ a clean ocean.

Last but not least, make it known that coral reefs are in danger by spreading the word to ____ around you.

Let people know about the threat to coral reefs and what ____ to take to save them.

This ____ make a big difference for the future.