阅读下列短文，从各题所给的A、B、C项中选出最佳选项.

A 13-year-old American has made a cheap machine that can help blind people read.

The blind canreadby using Braille – a system of small bumps (隆起物) that the blind touch to read the letters. The machine that makes these small bumps usually costs at least $2,000. It is called Braille writer. The American schoolboy, Shubham Banerjee, made a new Braille writer from a Lego tool that lets people create robots. Banerjee has called his new machine the Braigo – a combination (组合) of the words Braille and Lego. It costs just $ 350. It works by changing electronic text into Braille and then printing it using a computer or mobile machine.

Banerjee designed (设计) his Braigo last year for a school science exhibition. Since then, he has caught the interest of Silicon Valley in the USA. The big technology company Intel spent money on Banerjee’s machine last November, but they did not say how much money they put in. Banerjee also got $35, 000 from his father to help him start the project. His father works as a computer engineer (工程师) at Intel. He spoke about why he gave so much money to his son, saying:”We as parents started to be interested more, thinking that he’s on to something and this invention has to continue.” Banerjee told the AP News: “My dream would probably be having most of the blind people…using my Braigo.”

 化肥为保证粮食丰产起了重要作用．下列化肥属于磷肥的是（　　）

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    A king received a gift of two great falcons (猎鹰), and they were really beautiful. He gave the birds to his head falconer to be trained.

    One day, the falconer told the king that although one of the falcons was soaring (高飞) high in thesky, the other bird couldn't move from its branch (树枝) since the day it arrived.

    The king called on many falcon trainers to train the falcon, but no one could make the bird fly.

    After he tried everything else, the king thought to himself, "Maybe I need someone morefamiliar (熟悉的) with the countryside to work out this problem.” So he asked his men to go and get a farmer.

    In the morning, the king was surprised to find the falcon was soaring high above the gardens. The king asked the farmer, “How did you make the falcon fly?” The farmer said to the king, “It was very easy. I just cut the branch which the bird was sitting on".

    We are all made to fly. But sometimes we just sit on our branches, don't want to leave the things that are familiar to us. So sometimes our lives are boring and not exciting. Let us learn to cut the branch that we are familiar with and free ourselves to a brave soar!