In the first paragraph the word “it” refers to

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• 1who lived in Puerto Rico first

  A.the Africans

  B.the Spanish

  C.the Americans

  D.the Taino people

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• 2Graphene's super strength lies in the fact that.

  A.It is the thinnest material in the world.

  B.It is made of the most abundant elements in the world.

  C.It can help to make electronic components smaller.

  D.It helps engineers to produce more sensitive electronic products.

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• 3What does the writer tell in the last two paragraph 、

  A.An easy way to find graphene.

  B.Significance of the discovery of graphene.

  C.Development of high-tech wonders.

  D.Possible applications of graphen

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• 4The word “apply” in paragraph 4 could be used to replaced by 、

  A.push.

  B.find.

  C.collect.

  D.put.

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• 5Which of the following statements about graphene is true 、

  A.It is visible to the human eye.

  B.It is possibly the thinnest material in the world.

  C.It can be used to make paper.

  D.Finding it demands time and money.

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• 6what is the main idea of the second paragraph、

  A.Taino dishes are important in Puerto Rican cooking

  B.Food imported by foreigners isn’t really Puerto Rican

  C.Puerto Rican cooking has many outside influences

  D.African foods have probably had the most influence

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• 7How is sofrito used、

  A.It is eaten before meals

  B.It is added to other dishes

  C.It is used where foods are too spicy

  D.It is eaten as a main dish

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• 8which of the following is NOT true、

  A.softito is a type of extremely spicy food

  B.Many people think Puerto Rican food is spicy

  C.Puerto Rican cuisine uses a lot of chili peppers

  D.Aij caballero is a type of chile pepper

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• 9"Cats", "monkeys" and 'giraffes" mentioned in paragraph 1 are examples to illustrate

  A.they are highly-evolved species as humans.

  B.animals have skills that humans do not possess.

  C.humans can learn animals' skills.

  D.they are skillful in different ways.

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• 10Which of the following can be found in the archive gallery、

  A.First practical airplanes built in the late 19th century.

  B.History books.

  C.The Wright brothers' sculpture.

  D.Leonardo da Vinci's bird-like flying machines.

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