单项选择题

Most Americans______.

A．buy genetically-engineered foods
B．know the foods they buy are genetically engineered
C．want genetically-modified foods to be clearly labeled
D．eat genetically-modified foods
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单项选择题
The public cannot make informed choices of what food they buy because______.
A．there is no clear labeling on the food
B．they are not well informed of the potential danger of genetically-modified food
C．there is no adequate education on proper diets
D．they are not concerned about genetically-modified ingredients in their food
单项选择题
What is NOT tree about genes in the process of genetic modification
A．Genes interact with one another.
B．Normal genes may be damaged in the process.
C．The transferred gene may have different functions in different organisms.
D．The transferred trait controlled by one gene can be transferred endlessly.
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