课文填空 , this has been used to produce plants which are better able to pests and disease．迄今为止.这项技术已经被用来生产能更好地抵御虫害和疾病的植物. 题目和参考答案——青夏教育精英家教网—

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课文填空

_________　_________, this _________ has been used to produce plants which are better able to _________　_________　_________ pests and disease．

迄今为止，这项技术已经被用来生产能更好地抵御虫害和疾病的植物。

答案：So,far,technology,defend,themselves,against

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