44. What is mainly talked about in the last paragraph?

　　A. Whose advice is the best.

　　B. Who is the most long-lived person in the world.

　　C. Lifestyles of long-lived people.

　　D. How long-lived people think of their life.

　　C

　　The 2017 London Olympics had enough problems to worry about. But one more has just been added - a communications blackout caused by solar storms.

　　After a period of calm within the Sun, scientists have detected the signs of a flesh cycle of sunspots that could peak in 2017, just in time for the arrival of the Olympic torch in London.

　　Now scientists believe that this peak could result in vast solar explosions that could throw billions of tons of charged matter towards the Earth, causing strong solar storms that could jam the telecommunications satellites and interact links sending five Olympic broadcast from London.

　　"The Sun's activity has a strong influence on the Earth. The Olympics could be in the middle of the next solar maximum which could affect the functions of communications satellites," said Professor Richard Harrison, head of space physics at the Rutherford Appleton Laboratory in Oxfordshire.

　　At the peak of the cycle, violent outbursts called coronal mass ejections (日冕物质抛射) occur in the Sun's atmosphere, throwing out great quantities of electrically-charged matter. " A coronal mass ejection can carry a billion tons of solar material into space at over a million

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