用动词的适当形式填空:——What did the snake do when you_____(step)on it yesterday?--It _____(spit)poison.I had to see the doctor at once.

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用动词的适当形式填空:——What did the snake do when you_____(step)on it yesterday?--It _____(spit)poison.I had to see the doctor at once.
用动词的适当形式填空:——What did the snake do when you_____(step)on it yesterday?
--It _____(spit)poison.I had to see the doctor at once.

用动词的适当形式填空:——What did the snake do when you_____(step)on it yesterday?--It _____(spit)poison.I had to see the doctor at once.
——What did the snake do when you_stepped____(step)on it yesterday?
--It __spat/spit___(spit)poison.I had to see the doctor at once.

What did the snake do when you_stepped____(step)on it yesterday?
It _spit____(spit)poison.I had to see the doctor at once
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