what's in the your pencil case?应该选择I've got a ruler.还是 It's a ruler.我觉得2个都可以用,可是答案选择了前者,能否说明一下理由啊题目是what's in your pencil case?，刚刚发错了

what's in the your pencil case?应该选择I've got a ruler.还是 It's a ruler.我觉得2个都可以用,可是答案选择了前者,能否说明一下理由啊题目是what's in your pencil case?，刚刚发错了
what's in the your pencil case?
应该选择I've got a ruler.还是 It's a ruler.我觉得2个都可以用,可是答案选择了前者,能否说明一下理由啊
题目是what's in your pencil case?，刚刚发错了

what's in the your pencil case?应该选择I've got a ruler.还是 It's a ruler.我觉得2个都可以用,可是答案选择了前者,能否说明一下理由啊题目是what's in your pencil case?，刚刚发错了
第一个的意思是“我有把尺子”,而第二个意思是“它是尺子”,但问题并没有特指那一把尺子啊

问的是:你的笔盒里有什么?当然答:有个尺子了.第二个意思不太对