用isn't,aren't,can't,hasn't,don't,doesn't,wasn't,weren't填空:
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The tiger (doesn't )eat grass.They eat other animals.I( wasn't )at home yesterday evening.The hens ( can't )swim in the river.Pandas( can't )live in the water.There( isn't )any water in the river.There (aren't )any sheep on the farm.The boys and the girls( are )having a good time lat summer holiday.The elepant( hasn't )got any fur.