D．Running has changed in Jamaica.

　　E．Most of the country’s world class runners started out in the two leading track clubs.

　　F．Hard training and iron will is essential to be among the best in the world.

　　G．However，there is no evidence of such a gene.

　　Passage 2　(2016·临沂一模)

　　根据短文内容。从短文后的选项中选出能填入空白处的最佳选项，选项中有两项为多余选项。

　　The days when a cellphone was used for nothing beyond calling and texting are gone.Today，we turn smart phones into magical machines with apps that transform them into musical instruments or business machines or video players.But it turns out that we are only searching the surface.Who knew that smart phones would make pretty good satellites？__1__

　　Smart phones forecast the weather

　　Networking expert Open Signal has discovered something interesting：the sensors in Android phones designed to measure battery temperature，light，pressure and 80 on can be used to generate surprisingly accurate weather reports.__2__

　　Smart phones save the rainforests

　　Detecting illegal logging(盗伐) may sound like a novel app，__3__：in Indonesia，the non－profit organization Rainforest Connection’ wants to use donated Android phones to detect illegal logging.As New scientist reports，“The phones are equipped with solar panels specifically designed to take advantage of the brief periods when light reaches the forest floor.Their microphones stay on at all time，and the software listens for the sound of a chainsaw (链锯)．”

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