Reptiles produced young generally bylayingeggs．题目和参考答案——青夏教育精英家教网——

题目内容

17．Reptiles produced young generally bylayingeggs．

分析爬行动物通常由下蛋繁殖后代．

解答答案laying．考查单词填空．根据句意，下蛋，用词组lay eggs．空格前为介词by，空格中的动词lay要用V-ing形式．故填laying．

点评考查单词填空的题，根据句意选择单词，再根据题干的时态、人称、单复数等确定具体形式．

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