What's this?This is a ruler.这句有什么错误,

what is this?可以写成 what's this?为什么? What's color is this?.改错 What I__ is this?It's x. What ( )is this It'sv what is this thing's name? What country is this?It's. What's this?This is a ruler.这句有什么错误, whats this?This is a M改错 What's this in English?ThisWhat's this in English?This is a key. what's this? what s this回答 whats this what's this是什么意思 What's this? 翻译 what’s this? this's what i what's this? what's this