• Farmers who grow GM crops use fewer enviornmentally damaging pesticides. • GM crops can have larger yields. The increasing yields of GM crops are essential to feeding the
• When a species dies out or mutates, it has a knock-on effect on the whole ecosystem.党某一物种灭绝或者发生基因突变,它会对整个生态系统产生 连锁反应。
• cynical 愤世嫉俗的 • the habitat of polar bears 北极熊的栖息地 • comearound to my way of thinking 改变思维方式 • a guinea pig 试验品(小白鼠)
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Reference answers
• 1. • their natural state, man-made ingredients shelf life, hydrogen, up
to a half gram, the same as, look old • 2. • bad, good, plastic, cells, communicate or talk, cancer, packaged
3. Viewing and Speaking
• List some processed foods which you like but may do harm to your health if you eat too much of them. And tell us why you like them?