Ever since human beings looked out to the sea，they have wondered what was out there.We first began to dive for food.The first sailing vessels（船舶） brought together many cultures that had previously remained isolated.The first diving bells allowed us to work underwater for extended periods of time.As ship construction techniques continued to advance，we were able to go farther out to sea and new lands were discovered.As we began to dive deeper into the sea，we began to understand how deep the oceans really were ...On the website Sea and Sky，you can explore these major milestones and discoveries and learn about the history of ocean exploration.
5000 BC～1 BC
   Ocean exploration began around 5000 BC with the first ocean diving and the first sailing vessels.Many advances were made in the following years including the first diving bells and coastal maps.
1 AD～1600
   As sailing vessels became more advanced，explorers went farther from shore，discovering new lands and travelling around the world.Diving technology also continued to advance during this time.
1601～1800
   During the 1600s and 1700s，deep diving became possible with the development of diving suits and helmets.Expeditions continued to sail the world's oceans and the first submarine was invented.
1801～1900
   Technological advances in the 1800s enabled the development of more advanced diving equipment including the first scuba.Expeditions began to discover the existence of deep sea life.
1901～1950
   The 1900s saw the first maps of the ocean floor and the first deep ocean dives.The aqualung（水中呼吸器） was invented by Jacques Cousteau，and a prehistoric fish long thought to be extinct was found alive on the ocean floor.
1951～1970
   The deepest ocean dive took place in 1960，ocean laboratories evolved，and the National Oceanic and Atmospheric Administration（NOAA） was established in 1970 to help with ocean research.
1971～Present
   Since 1970，many exciting new discoveries have been made，including the discovery of deep sea hydrothermal vents（深海熱泉） ，the discovery of the wreck of the Titanic，and the first video of alive giant squid（魷魚） in the ocean.

（1）What marked the beginning of ocean exploration？

B

B

A．The first diving bells.
B．The first sea diving.
C．The first sailing plan.
D．The first coastal maps.
（2）Which of the following is TRUE about the history of ocean exploration？

C

C

A．Deep diving became possible with the first submarine invented.
B．All prehistoric fish were found dead after the aqualung was invented.
C．NOAA was set up in 1960 to help scientists carry out some ocean research.
D．Quite a few new discoveries about the ocean have been made in the past fifty years.
（3）What would be the best title for the passage？

C

C

A．The Website Sea and Sky
B．The Evolution of Marine Wildlife
C．Ocean Exploration Timeline
D．The Importance of Ocean Exploration