Questão 2555879

Read the text and answer questions 43, 44 and 45.

Why do planes crash?

1 Navigational errors are among the most common causes of

plane crashes. Planes are flown into a mountain or the sea

out of a variety of reasons. Sometimes weather conditions

are bad, in other cases pilots have made bad judgements.

5 In 1996 a Peruvian airliner crashed into the sea after the

computer stopped working. The crew had almost no data left

to work with and didn't know at which height they were

flying when they hit the water.

In 1977 almost 600 people got killed when two planes

10 were heading at full speed towards each other and collided in

heavy fog on the runway in Tenerife. The crash happened

after planes had been guided to Tenerife because Gran

Canary airport was closed.

In June 2009 an Air France airbus disappeared off the

15 coast of Brazil. Although the wreckage was found after

a few days it took investigators almost three years to find out

what had really happened to the plane.

Pilots are criticising the way planes are ____. In the past

decades the structure of planes has changed. More computers

20 and automated systems are taking over, the pilot often has no

alternatives left.

(Adapted from http://www.english.online.at/news-articles/technology)

Complete the sentence in the text (line 18) with the correct option