题目内容

16.The reptiles produced young generally by laying eggs.

分析 爬行动物通过下蛋来产仔.

解答 laying;lay是一个动词,意为"产卵",从前面produce young可推知,这里要表达下蛋(lay egg),by是介词,后面应该加动词ing形式,故填laying.

点评 考查动词的词义,在熟记单词词义的基础上还要联系语境,从而写出正确答案,写动词时还要注意其人称、时态和语态的变化.

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