1 . Mother Nature is a cruel mistress. Why? Read on to find the answer.

Venice

This iconic city is sinking rapidly. The canals that make up the streets of Venice rise 2mm every year, making relics of history go under the surface of water and destroying architecture. Experts warn that without intervention (干预) , this city will disappear back into the water at an even faster rate, consumed by rising sea level from melting polar ice caps.

Machu Picchu

These iconic ruins have drawn adventurous tourists into the mountains of South America. The forces of natural erosion (侵蚀) have been accelerated by tourism and this landmark faces severe influence from increasing foot traffic. The Peruviar government recently suggested a cable car that would cut out the intense hike up to the ruins, making the site instantly accessible to millions, but the future of Machu Picchu remains uncertain.

Glacier National Park

Perhaps you’ve heard that the ice caps are melting. But nowhere is more apparent in the United States than in Glacier National Park. Estimates indicate that the glaciers that are part of the beauty of this national landmark will disappear entirely in the next two decades.

The Great Barrier Reef

Hidden from view beneath the waves, the Great Barrier Reef has been rapidly dying off. Nearly fifty percent of coral which once occupied a large area is gone, destroyed by pollution and disease.

1. What can we learn about Machu Picchu?

A．It’s famous for cable cars.	B．It will soon turn away all visitors.
C．It bears a heavy burden of tourism.	D．It’s well preserved by the locals.

2. Which place probably needs visitors to dive into the water to enjoy its beauty?

A．The Great Barrier Reef.	B．Machu Picchu.
C．Glacier National Park.	D．Venice.

3. What do the above attractions have in common?

A．They all have a long history.	B．They’re all threatened by climate.
C．They’re all in danger of disappearing.	D．They’re all well-known for natural scenery.