問題詳情

17. Parkish and many other scientists argue that genetic engineering can help address the urgent problems of food shortage byincreasing crop quantities, ____ crop varieties that resist pests and disease.
(A) offering
(B) offers
(C) offered
(D) offer

參考答案

答案:A
難度:簡單0.744898
統計:A(73),B(6),C(9),D(2),E(0)

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