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 ---Look!Thedinosaurs’eggs.---Sobig!Doyouknowwhenthey

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问题详情:

 ---Look!Thedinosaurs’eggs.---Sobig!Doyouknowwhenthey

 ---Look! The dinosaurs’ eggs .

---So big! Do you know when they ________?

      been lain   B. were lain 

      C. were lay        laid

    

【回答】

D

知识点:动词时态

题型:选择题