試題詳解

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(A) In view of health concerns, opposition to genetically modified crops is on the rise.
(B) However, price and supply concerns seem to have people thinking a little bit differently today.
(C) Until now, to avoid consumer backlash, the companies have paid extra to buy conventionally grown corn.
(D) Genetically modified crops will be essential for helping the world cope with the demand for food in the decades ahead.