공통영어1 천재 조수경 4과 변형문제

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

Over the course of many years, corals build up to form large structures called coral ____

____ colored coral reefs provide a beautiful underwater landscape.

However, this is not the only reason they are ____

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

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

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

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

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

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

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

Consequently, they prevent the land ____ 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 to as ____ “medicine chests of the sea.

These underwater ____ are under threat of destruction.

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

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

The U.N. reported that many ____ the world’s coral reefs are currently endangered.

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

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

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

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

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

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

Another serious cause is ____ waste.

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

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

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

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

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

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

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

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

The 3D printer creates artificial support ____ corals.

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

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

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

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

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

Second, you can volunteer to help clean the ____

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

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

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

This will make a big difference ____ the future.