与What’s this in English?It’s pen.有关的几个问题这个答语对否?pen前必须加冠词吗?为什么必须用It’s而不能用this is来回答?

What’s this in ( ) WHAT'S THIS IN ENGLISH? What`s this in english? What's this in English? What's this in Chinese? What's this in English什么意思 What's this in English?复数 what's this in english表示什么 What's this in English? 是什么意思 what’s this in Chinese?翻译中文 what’s this in English?中文意思 Look!What's this in English?( )(尺子) what's this in english 的答语 同义句 What's this in English? what's this in English的同义词 What's this in English?It's____egg what's this in the backpack what s this in Engish?写答语