The Dead Sea

    At 430 meters below sea level， the Dead Sea is Earth's lowest point on land． It is popular for its wonderful buoyancy（浮力）． The high salt content﹣more than 34 percent ﹣ makes swimming more like floating．

    Now the Dead Sea is actually dying． People are using water from the Jordan River， which takes water away from the Dead Sea． Since 1930， its surf area has reduced by almost 40 percent．

    Venice， Italy

    With waterways instead of streets． This "Floating City" has attracted visitors for centuries． But no visit to Venice is complete without a ride on one of its famous gondolas， human powered water taxis． Water creates Venice． But water will also kill the city．

    Built on soft earth， Venice has slowly been sinking （下沉） for centuries． Now， with rising sea levels caused by human activities， it's sinking faster． According to US﹣based magazine Architectural Digest， the city may disappear in the next 100 years． Better book your gondola soon!

    Great Barrier Reef， Australia

    Covering more than 2，300 kilometers of Australia's northeast coast， Great Barrier Reef is the world's largest reef ecosystem， and an ideal place for scuba divers （水肺潜水者）．Thousands of colorful coral （珊瑚） and fish make homes in the blue sea water． It's like a big underwater party!

    Sadly， the party might be over soon． The reef is dying． Human activities are changing the weather． Warming ocean， water kills the coral， and this causes problems up the food chain． The New York Times reported that large parts are already dead， and the reef system might be gone by 2030．

（1）What can be the best title of the passage？　　

A． Disappearing Watery Wonders

B． Amazing Man﹣made Wonders on the Sea

C． Lost Watery Wonders on the Sea

D． Last Watery Wonders in the World

（2）Which of the following is the shared cause of the problems all the three places are facing？　　

A． Water loss．

B． Sea pollution．

C． Warming seas．

D． Human activities．

（3）If Tom wants to visit all the following places before they are gone， and he can only afford one in the next 15 years， where must he go？　　

A． The Dead Sea．

B． Venice．

C． Italy．

D． Great Barrier Reef．