问题描述：
用be的适当形式填空
1.__________I a student?
2.__________Jack his friend?
3.__________the twins new students?
4.Where___________your teachers?
5.Five and there____________eight.
1.__________I a student?
2.__________Jack his friend?
3.__________the twins new students?
4.Where___________your teachers?
5.Five and there____________eight.
问题解答：
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