The police asked her to ________the man who took her purse. （描述 形容）
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Will genetic engineering forever change the face of_______.(人类）
Would you ________to visit New York or Chicago? (更喜欢，宁愿）
Almost every day scientists________new genes and the traits.(确定，鉴定）
There is a _____ of water .(短缺）
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