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  3. A controversial decision on whether choice cuts of steak and cartons of milk produced from cloned animals are suitable for the d

A controversial decision on whether choice cuts of steak and cartons of milk produced from cloned animals are suitable for the d

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问题     A controversial decision on whether choice cuts of steak and cartons of milk produced from cloned animals are suitable for the dinner table is now long overdue.
    Hundreds of pigs, cows and other animals created with the help of cloning are living (1)_____ farms across the United States and (2)_____ the forthcoming ruling will directly (3)_____ American consumers, British holidaymakers may also (4)_____ themselves at the forefront of a food revolution that many commentators expect will (5)_____ arrive here.
    (6)_____ the birth of Dolly the sheep—the first mammal cloned from an adult cell—there were extreme predictions of herds of genetically (7)_____ bulls and pastures (8)_____ with cloned dairy cows.
    That double (9)_____ of the past decade has not yet been realized (10)_____ clones have become a familiar sight at agricultural fairs in America, where producers of (11)_____ pigs and cattle have been among the first to (12)_____ cloning, which offers a way to keep (13)_____ traits without inbreeding problems caused by traditional methods. Clones of rare and elite animals, including sheep, goats, and rabbits, (14)_____ a way to improve animal healthy, (15)_____ the nutritional value of meat and milk, and breed animals immune (16)_____ diseases or better suited for developing countries.
    The safety of cloned (17)_____ has been under examination by various bodies. Three years ago the US National Academy of Science concluded that (18)_____ available data indicated that cloning met animal welfare and food safety considerations, more information was needed. (19)_____ scientific evidence suggests that there is little (20)_____ for alarm, at least on food-safety grounds.

选项 A、since
B、although
C、as
D、therefore
答案B
解析 逻辑衔接题。本题应结合整句话的意思分析，本句提到克隆动物食品在美国已相当普遍，而且对其做出的裁定将会直接影响到美国的消费者；后半部分又提到英国的度假者们实际上也已处在一场食品革命的前沿，由此可见这两部分内容之间是转折关系，所以本题选although"虽然，尽管"。since表示"自…以后；既然"；as表示"当…之时，象，因为"；therefore表示"因此，所以"；这三个连词均不符合题目的逻辑关系。
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考研英语一

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