The closer a plant is to its natural state; the less suitable it is to__________．

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• 1The weather conditions during the growth of crops__________．

  A.show that organic crops are safer than conventional ones

  B.be specially trained

  C.improve soil quality

  D.poison you

  E.be eaten

  F.affect their nutritional content

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• 2There is no convincing evidence to__________．

  A.show that organic crops are safer than conventional ones

  B.be specially trained

  C.improve soil quality

  D.poison you

  E.be eaten

  F.affect their nutritional content

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• 3Techniques of organic farming help__________．

  A.show that organic crops are safer than conventional ones

  B.be specially trained

  C.improve soil quality

  D.poison you

  E.be eaten

  F.affect their nutritional content

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• 4Paragraph 4__________．

  A.Main reason for the popularity of organic food

  B.Description of organic farming

  C.Factors that affect food health value

  D.Testing the taste of organic food

  E.Necessity to remove hidden dangers from food

  F.Research into whether organic food is better

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• 5Paragraph 3__________．

  A.Main reason for the popularity of organic food

  B.Description of organic farming

  C.Factors that affect food health value

  D.Testing the taste of organic food

  E.Necessity to remove hidden dangers from food

  F.Research into whether organic food is better

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• 6What is the writer’s main purpose in Paragraph 2 、

  A.To reject the view that adopted children need two languages．

  B.To argue that culture affects the way children learn a language．

  C.To give reasons why adopted children were used in the study．

  D.To justify a particular approach to language learning．

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• 7Snedeker，Geren and Shafto based their study on children who__________.

  A.were finding it difficult to learn English

  B.were learning English at a later age than US children

  C.had come from a number of language backgrounds

  D.had taken English lessons in China

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• 8What aspect of the adopted children’s language development differed from that of US—born children、

  A.The rate at which they acquired language．

  B.Their first words．

  C.The way they learnt English．

  D.The point at which they started producing sentences．

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• 9What does the Harvard finding show、

  A.Not all toddlers use babytalk．

  B.Some children need more conversation than others．

  C.Language learning takes place in ordered steps．

  D.Not all brains work in the same way．

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• 10When the writer says “critical period”，he means a period when__________．

  A.studies produce useful results

  B.adults need to be taught like children

  C.1anguage learning takes place effectively

  D.immigrants want to learn another language

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