单项选择题
A．enthusiastic about biotechnology B．very wary about genetic engineering C．reluctant to try new plant combinations D．alarmed about limitless experiments
A．experiments on plants in the fields B．developing strains of hybrid corn C．breeding plants in test tubes D．rearranging plant genes in laboratories
A．a potato-tomato hybrid B．new plant technology C．self-fertilizing plants D．less dramatic results than the new technology