Question

De acordo com o texto, assinale a alternativa correta.

A Routine Flight, Till Both Routine and Flight Vanish
The night sky was clear above the clouds, and the last glimmer of a setting half-moon had faded when Malaysia Airlines Flight 370 approached the border between Malaysian and Vietnamese airspace on its usual route to Beijing. What happened next should have been routine for a twice-daily flight between two of Asia’s most important cities. Air traffic controllers outside Kuala Lumpur usually hand the jet off to their counterparts in Ho Chi Minh City as the flight turns northeast toward the Chinese capital.But in those early hours of March 8, pilots flying nearby heard an unusual crescendo of chatter on the radio frequencies used by radar control in Vietnam and Malaysia. Air traffic personnel in both countries were trying and failing to reach the plane. “Any stations in contact with Malaysian 370, please relay.” Vietnamese and Malaysian controllers asked many aircrafts to radio the jet. Pilots listened as one plane after another tried and heard only static. “Malaysian 370, this is Malaysian 88.” “Malaysian 370, this is Malaysian 52.” People familiar with the calls, describing them for the first time, said they were calm, even laconic. The pilots trying to reach the airliner had no reason to believe it had suffered anything more than an ordinary radio malfunction. But those initial attempts to find a plane in the skies would soon evolve into an urgent multinational search operation spanning land and sea in two hemispheres. They signaled the start of what has become perhaps the most perplexing case in modern aviation − one that investigators say may take years to solve, or could remain a mystery forever. More than two weeks after Flight 370 disappeared, unbridled speculation surrounds the unfolding global drama. So much is uncertain about what happened on the plane, and so much of what has been disclosed by Malaysian authorities has been contradicted, that hardly any theory of its fate can be easily dismissed. On Saturday, the authorities said a Chinese satellite had made a new sighting of a possible object floating in the southern Indian Ocean in the area that is now the focus of the search, and China was sending ships to investigate. Based on dozens of interviews with people whose lives were touched by the plane as well as with outside experts and investigators from the two dozen countries searching for answers, this report presents a portrait of Flight 370 and the search to find it using what is known to date. But by necessity, it is an incomplete picture.

( ) os investigadores acreditam que o mistério pode levar vários anos para ser resolvido.

( ) especialistas acreditam estar perto de desvendar o mistério.

( ) acredita-se que seu sistema de rádio tenha entrado em pane.

( ) depois de algumas tentativas de contato com a aeronave, os controladores ouviram um ruído incessante pelo rádio.

( ) os pilotos que voavam por perto conseguiram um contato lacônico com a aeronave.

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Answer 1

4, depois de algumas tentativas de contato